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diff --git a/src/helppages.h b/src/helppages.h
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+/* To generate this help page, use the script makedoc.sh */
+
+int Npages = 21;
+
+char *helppages[][10] = {
+
+{ "add",
+"\
+\n\
+HELP PAGE FOR COMMAND add\n\
+\n\
+SYNTAX\n\
+add [MOVES|$ID1|@ID1] $ID2\n\
+\n\
+DESCRIPTION\n\
+Appends either MOVES, the scramble memorized under $ID1 or the output sequence\n\
+memorized under @ID1 at the end of the scramble memorized under $ID2. If none\n\
+of MOVES, $ID1 or @ID1 is specified, the user will be asked to type the moves.\n\
+Menmonic: \"add x to y\" or just \"add to y\".\n\
+\n\
+EXAMPLES\n\
+add $1\n\
+  The user is required to type the moves that will be appended to $1.\n\
+add F R B $1\n\
+  Appends the moves F R B to scramble $1. Now scramble $1 ends with F R B.\n\
+\n\
+"
+},
+
+{ "change",
+"\
+\n\
+HELP PAGE FOR COMMAND change\n\
+\n\
+SYNTAX\n\
+change $ID1 [MOVES|$ID2|@ID2]\n\
+\n\
+DESCRIPTION\n\
+Changes the scramble $ID1 to either MOVES, the scramble $ID2, the output @ID2\n\
+or, if none is specified, the moves entered by the user. The scramble that was\n\
+memorized under $ID1 is then lost.\n\
+Mnemonic: \"change x to y\", or just \"change x\".\n\
+\n\
+EXAMPLES\n\
+change $1\n\
+  The user is required to type the moves that will replace $1.\n\
+change $2 $3\n\
+  Saves the scramble that was saved under $3 in $2. Now $2 and $3 are the same\n\
+  scrambles, and the old $2 is lost.\n\
+change $1 U R\n\
+  Saves U R as scramble $1.\n\
+\n\
+"
+},
+
+{ "clear",
+"\
+\n\
+HELP PAGE FOR COMMAND clear\n\
+\n\
+SYNTAX\n\
+clear\n\
+\n\
+DESCRIPTION\n\
+Resets all saved scrambles and output sequences.\n\
+\n\
+"
+},
+
+{ "dr",
+"\
+\n\
+HELP PAGE FOR COMMAND dr\n\
+\n\
+SYNTAX\n\
+dr [OPTIONS] [MOVES|$ID|@ID]\n\
+\n\
+DESCRIPTION\n\
+Solves DR for a given scramble. A scramble can be given as last argument of the\n\
+command, or an ID of a saved scramble can be provided. If none of the two is\n\
+given, a prompt will ask the user to input a new scramble.\n\
+If the option \"from\" is given (see below), it solves DR from an EO (if edges\n\
+are oriented) without breaking that EO.\n\
+The first time this command is called without the option from (and, to some\n\
+extent, also the first time it is called with the option from), nissy loads\n\
+some pruning tables that were not loaded on startup, causing a small but\n\
+noticeable delay.\n\
+\n\
+OPTIONS\n\
+axis={fb,rl,ud}    Specify the axis for the DR. One to three axes can be given,\n\
+                   comma separated, no spaces.\n\
+                   Default: DR on any of the three axis (omitting the option is\n\
+                   the same as specifying axis=fb,rl,ud).\n\
+b=N                Specify a bound for the number of moves. N must be a number.\n\
+                   Default value: 20.\n\
+h                  Show hidden DRs.\n\
+                   Default, if an DR ending in e.g. R is shown, the equivalent\n\
+                   one ending in R' is hidden.\n\
+from {fb|rl|ud}    Solve DR from the specified EO, which must be solved,\n\
+                   without breaking the EO.\n\
+niss               Use NISS. It works only if solving DR from EO.\n\
+                   Default: does not use NISS.\n\
+n=N                Specify a maximum number of EOs to be output. N must be a\n\
+                   number.\n\
+                   Default value: 1.\n\
+\n\
+EXAMPLES\n\
+dr from rl axis=ud $1\n\
+  Finds optimal DR on ud, starting from EO on rl, for the first saved scramble.\n\
+\n\
+dr niss from fb n=10 m=6 F2 R L B' F D U' R2 L' F D B\n\
+  Finds up to 10 DRs of length at most 6 from EO on fb, possibly using NISS.\n\
+\n\
+dr n=100 axis=ud h\n\
+  Finds 100 DRs on ud, including \"hidden\" DRs.\n\
+\n\
+"
+},
+
+{ "drcorners",
+"\
+\n\
+HELP PAGE FOR COMMAND drcorners\n\
+\n\
+SYNTAX\n\
+drcorners [OPTIONS] [MOVES|$ID|@ID]\n\
+\n\
+DESCRIPTION\n\
+Similar to drfinish, but only solves corners. CO must be solved. The scramble\n\
+can be given as the last argument of the command, or it may be given as an $ID\n\
+or @ID, or it can be typed out on the following line.\n\
+\n\
+OPTIONS\n\
+from {ud|fb|rl}    Allows to specify on which axis the CO is solved. It is\n\
+                   usually not necessary, since nissy will find a CO on any\n\
+                   axis.\n\
+i                  Ignores E-layer centers. By default cornersare solved\n\
+                   relatively to centers; this options allows for solutions\n\
+                   which solve corners relatively to each other and to the\n\
+                   U and D sides, but not to the E layer (or any equivalent\n\
+                   if the CO is not on U/D).\n\
+b=N                Specify a bound for the number of moves. N must be a number.\n\
+                   Default value: 20.\n\
+n=N                Specify a maximum number of solutions to be output. N must\n\
+                   be a number.\n\
+                   Default value: 1.\n\
+\n\
+EXAMPLES\n\
+drcorners n=3 R' D R2 D' R' U2 R D R' U2 R' D' R\n\
+  Produces the following output:\n\
+Found 3 results.\n\
+@1:     U' F2 U R2 U2 F2 U F2 U R2 (10)\n\
+@2:     U' F2 U R2 U2 B2 U R2 D R2 (10)\n\
+@3:     U' F2 U R2 U2 B2 U L2 U L2 (10)\n\
+\n\
+"
+},
+
+{ "drfinish",
+"\
+\n\
+HELP PAGE FOR COMMAND drfinish\n\
+\n\
+SYNTAX\n\
+drfinish [OPTIONS] [MOVES|$ID|@ID]\n\
+\n\
+DESCRIPTION\n\
+Solves the given scramble using the DR moveset. DR must be solved. The scramble\n\
+can be given as the last argument of the command, or it may be given as an $ID\n\
+or @ID, or it can be typed out on the following line.\n\
+\n\
+OPTIONS\n\
+from {ud|fb|rl}    Allows to specify on which axis the DR is solved. It is\n\
+                   usually not necessary, since nissy will find a DR on any\n\
+                   axis, but it can be useful if one want to e.g. solve an HTR\n\
+                   state allowing quarter-turns from a specific DR.\n\
+b=N                Specify a bound for the number of moves. N must be a number.\n\
+                   Default value: 20.\n\
+n=N                Specify a maximum number of solutions to be output. N must\n\
+                   be a number.\n\
+                   Default value: 1.\n\
+\n\
+EXAMPLES\n\
+dr from ud R L' U2 R' L F2\n\
+  Solves the given scramble using the moveset <U,D,R2,L2,F2,B2>. In this case:\n\
+@1:     U2 R2 F2 R2 U2 R2 F2 R2 (8)\n\
+drfinish b=7 n=10 $1\n\
+  Finds (at most) 10 solutions of length at most 7 for the scramble $1.\n\
+\n\
+"
+},
+
+{ "eo",
+"\
+\n\
+HELP PAGE FOR COMMAND eo\n\
+\n\
+SYNTAX\n\
+eo [OPTIONS] [MOVES|$ID|@ID]\n\
+\n\
+DESCRIPTION\n\
+Solves EO for a given scramble. A scramble can be given as last argument of the\n\
+command, or an ID of a saved scramble can be provided. If none of the two is\n\
+given, a prompt will ask the user to input a new scramble.\n\
+\n\
+OPTIONS\n\
+axis={fb,rl,ud}    Specify the axis for the EO. One to three axes can be given,\n\
+                   comma separated, no spaces.\n\
+                   Default: EO on any of the three axis (omitting the option is\n\
+                   the same as specifying axis=fb,rl,ud).\n\
+b=N                Specify a bound for the number of moves. N must be a number.\n\
+                   Default value: 20.\n\
+h                  Show hidden EOs.\n\
+                   Default, if an EO ending in e.g. F is shown, the equivalent\n\
+                   one ending in F' is hidden.\n\
+niss               Use NISS.\n\
+                   Default: does not use NISS.\n\
+n=N                Specify a maximum number of EOs to be output. N must be a\n\
+                   number.\n\
+                   Default value: 1.\n\
+\n\
+EXAMPLES\n\
+eo axis=fb $1\n\
+  Finds one optimal EO on fb for the first saved scramble.\n\
+\n\
+eo n=5 b=4 U R F  \n\
+  Finds up to 5 EOs of length at most 4 for scramble U R F.\n\
+\n\
+eo n=100 b=5 niss axis=fb,ud h  R' U' F L R'U'F\n\
+  Finds up to 100 EOs of lenth at most 4, possibly using NISS, including\n\
+  \"hidden\" EOs, excluding the rl axis.\n\
+\n\
+"
+},
+
+{ "exit",
+"\
+\n\
+HELP PAGE FOR COMMAND exit\n\
+\n\
+SYNTAX\n\
+exit\n\
+\n\
+DESCRIPTION\n\
+Exits nissy.\n\
+\n\
+"
+},
+
+{ "help",
+"\
+\n\
+HELP PAGE FOR COMMAND help\n\
+\n\
+SYNTAX\n\
+help [nissy|COMMAND]\n\
+\n\
+DESCRIPTION\n\
+'help nissy' prints a general user manual. 'help COMMAND' prints a detailed\n\
+help page for the command COMMAND, if it exists. 'help' prints a list of all\n\
+available commands a short description for each.\n\
+\n\
+EXAMPLES\n\
+help help\n\
+  Prints this help page.\n\
+\n\
+"
+},
+
+{ "htr",
+"\
+\n\
+HELP PAGE FOR COMMAND htr\n\
+\n\
+SYNTAX\n\
+htr [OPTIONS] [MOVES|$ID|@ID]\n\
+\n\
+DESCRIPTION\n\
+Finds HTR for a given scramble. DR must be solved. A scramble can be given as\n\
+last argument of the command, or an ID of a saved scramble can be provided. If\n\
+none of the two is given, a prompt will ask the user to input a new scramble.\n\
+\n\
+OPTIONS\n\
+from {ud|fb|rl}    Allows to specify on which axis the DR is. This is usually\n\
+                   not needed, since nissy will automatically find it out.\n\
+b=N                Specify a bound for the number of moves. N must be a number.\n\
+                   Default value: 20.\n\
+h                  Show hidden HTRs.\n\
+                   Default, if an HTR ending in e.g. R is shown, the equivalent\n\
+                   one ending in R' is hidden.\n\
+niss               Use NISS.\n\
+                   Default: does not use NISS.\n\
+n=N                Specify a maximum number of HTRs to be output. N must be a\n\
+                   number.\n\
+                   Default value: 1.\n\
+\n\
+EXAMPLES\n\
+eo n=10 b=7 niss $1\n\
+  Finds up to 100 HTRs of lenth at most 7, possibly using NISS, including\n\
+  \"hidden\" HTRs, for scramble $1. DR must be solved.\n\
+\n\
+"
+},
+
+{ "htrfinish",
+"\
+\n\
+HELP PAGE FOR COMMAND htrfinish\n\
+\n\
+SYNTAX\n\
+htrfinish [OPTIONS] [MOVES|$ID|@ID]\n\
+\n\
+DESCRIPTION\n\
+Similar to drfinish, but uses the moveset <U2,D2,R2,L2,F2,B2>. HTR must be\n\
+solved. The scramble can be given as the last argument of the command, or it\n\
+may be given as an $ID or @ID, or it can be typed out on the following line.\n\
+\n\
+OPTIONS\n\
+b=N                Specify a bound for the number of moves. N must be a number.\n\
+                   Default value: 20.\n\
+n=N                Specify a maximum number ofsolutions to be output. N must be\n\
+                   a number.\n\
+                   Default value: 1.\n\
+\n\
+EXAMPLES\n\
+htrfinish R L' U2 R' L F2\n\
+  Produces the following solution:\n\
+@1:     U2 R2 F2 R2 U2 R2 F2 R2 (8)\n\
+\n\
+"
+},
+
+{ "invert",
+"\
+\n\
+HELP PAGE FOR COMMAND invert\n\
+\n\
+SYNTAX\n\
+invert [MOVES|$ID|@ID]\n\
+\n\
+DESCRIPTION\n\
+Inverts a sequence of moves, which can be given also as $ID or @ID. The given\n\
+sequence must not use NISS (if it does, use the command unniss first).\n\
+\n\
+EXAMPLES\n\
+invert F R D'\n\
+  Prints D R' F'\n\
+\n\
+"
+},
+
+{ "nissy",
+"\
+\n\
+*******************************************************************************\n\
+********************* NISSY: a cube solver and FMC helper *********************\n\
+*******************************************************************************\n\
+\n\
+If you just want to solve the cube, type 'solve' followed by the scramble. This\n\
+will not always give you an optimal solution, unless it is 10 moves or less or\n\
+you use the \"o\" option. Finding the optimal solution might take very long if it\n\
+is 16 moves or more, especially for the first time.\n\
+\n\
+Now the fun stuff. With nissy you can save and manipulate move sequences, for\n\
+example:\n\
+\n\
+nissy-# save R' U' F\n\
+$1:     R' U' F\n\
+nissy-# add L2D' $1\n\
+$1:     R' U' F L2 D'\n\
+\n\
+You can then ask nissy to solve certain substepson a saved scramble:\n\
+\n\
+nissy-# eo axis=rl $1\n\
+@1:     U D F' R (4)\n\
+\n\
+And of course it uses also NISS, if you ask:\n\
+\n\
+nissy-# eo niss axis=rl $1\n\
+@1:     (R) (1)\n\
+\n\
+Notice that the sequences you save are marked with a $, while the \"output\"\n\
+sequences are marked with @. The difference between these two type of sequences\n\
+is that those marked with @ are temporary and get lost once you get new output.\n\
+Most commands accept as input either a move sequence typed out, a $-sequence or\n\
+a @-sequence. For example, you can however save a @-sequence and make it\n\
+persistent:\n\
+\n\
+nissy-# save @1\n\
+$2:     (R)\n\
+\n\
+Nissy also understands NISS. Let's see a more complicated example where you\n\
+save a scramble, ask for some EOs (using NISS) and then a DR on inverse:\n\
+\n\
+nissy-# save R' U' F R U R2 F2 R2 D R2 U L2 U R2 D2 B' D U' R D R' D U2 F2 R' U' F\n\
+$3:     R' U' F R U R2 F2 R2 D R2 U L2 U R2 D2 B' D U' R D R' D U2 F2 R' U' F \n\
+nissy-# eo n=10 niss axis=fb,rl $3\n\
+Found 10 results.\n\
+@1:     (U' L B D F) (5)\n\
+@2:     (U' L B' D F) (5)\n\
+@3:     (L B U D F) (5)\n\
+@4:     (L B' U D F) (5)\n\
+@5:     R U B U L (5)\n\
+@6:     R U' L (B L) (5)\n\
+@7:     R U' B U L (5)\n\
+@8:     R L (L B L) (5)\n\
+@9:     R (U2 D' F R) (5)\n\
+@10:    R (U2 F D' R) (5)\n\
+nissy-# add @6 $3\n\
+$3:     R' U' F R U R2 F2 R2 D R2 U L2 U R2 D2 B' D U' R D R' D U2 F2 R' U' F R U' L (B L) \n\
+nissy-# unniss $3\n\
+@1:     L' B' R' U' F R U R2 F2 R2 D R2 U L2 U R2 D2 B' D U' R D R' D U2 F2 R' U' F R U' L \n\
+nissy-# invert @1\n\
+@1:     L' U R' F' U R F2 U2 D' R D' R' U D' B D2 R2 U' L2 U' R2 D' R2 F2 R2 U' R' F' U R B L \n\
+nissy-# save @1\n\
+$5:     L' U R' F' U R F2 U2 D' R D' R' U D' B D2 R2 U' L2 U' R2 D' R2 F2 R2 U' R' F' U R B L \n\
+nissy-# dr from rl $5\n\
+@1:     F2 U D2 F' B D B (7)\n\
+nissy-# \n\
+\n\
+If you ask nissy to solve a substep (or the whole cube) using a sequence with\n\
+NISS as scramble, it will first un-NISS it (but without saving the unNISSed\n\
+scramble anywhere):\n\
+\n\
+print $3\n\
+$3:     R' U' F R U R2 F2 R2 D R2 U L2 U R2 D2 B' D U' R D R' D U2 F2 R' U' F R U' L (B L) \n\
+nissy-# solve $3\n\
+@1:     F U' R2 F2 U2 F U2 R2 L2 D R2 U B2 D' L2 D B2 D2 (18)\n\
+\n\
+Nissy knows how to solve certain common sub-steps for DR (or Thistlethwaite /\n\
+Kociemba algorithms). For now it does know more common speedsolving methods.\n\
+\n\
+For a full list of commands type \"help\". For a more detailed help on a specific\n\
+command, type \"help (command)\". The help pages can also be found in the docs\n\
+folder.\n\
+\n\
+If you want to report a bug (I'm sure there are many!) or give a suggestion,\n\
+you can send an email to sebastiano.tronto@gmail.com.\n\
+\n\
+Have fun!\n\
+\n\
+"
+},
+
+{ "pic",
+"\
+\n\
+HELP PAGE FOR COMMAND pic\n\
+\n\
+SYNTAX\n\
+pic [MOVES|$ID|@ID]\n\
+\n\
+DESCRIPTION\n\
+Prints the cube state after applying the given scramble.\n\
+\n\
+EXAMPLES\n\
+pic R' U' F R U R2 F2 R2 D R2 U L2 U R2 D2 B' D U' R D R' D U2 F2 R' U' F \n\
+  Gives the following output:\n\
+               UF  UL  UB  UR  DF  DL  DB  DR  FR  FL  BL  BR \n\
+EP:                      FR  UL  FL  UR  UF  DB  DR  BL  UB  BR  DL  DF \n\
+EO(F/B):              x   x   x   x       x           x   x   x     \n\
+\n\
+                           UFR  UFL  UBL  UBR  DFR  DFL  DBL  DBR \n\
+CP:                      UBR  UFR  DFL  DBL  UFL  UBL  DBR  DFR \n\
+CO(U/D):             ccw                  cw       ccw   cw\n\
+\n\
+"
+},
+
+{ "print",
+"\
+\n\
+HELP PAGE FOR COMMAND print\n\
+\n\
+SYNTAX\n\
+print [$ID|@ID]\n\
+\n\
+DESCRIPTION\n\
+Prints memorized sequences. If no argument is given, it prints all memorized\n\
+scrambles ($ only). If $ID or @ID is specified, it only prints the relative\n\
+memorized sequence.\n\
+\n\
+EXAMPLES\n\
+print\n\
+  Prints a list of all memorized scrambles (only $).\n\
+print $2\n\
+  Prints the second memorized scramble.\n\
+print @13\n\
+  Prints the 13th sequence that was part of the output of the last command.\n\
+\n\
+"
+},
+
+{ "quit",
+"\
+\n\
+HELP PAGE FOR COMMAND quit\n\
+\n\
+SYNTAX\n\
+quit\n\
+\n\
+DESCRIPTION\n\
+Exits nissy.\n\
+\n\
+"
+},
+
+{ "replace",
+"\
+\n\
+HELP PAGE FOR COMMAND replace\n\
+\n\
+SYNTAX\n\
+eo [OPTIONS] [MOVES|$ID|@ID]\n\
+\n\
+DESCRIPTION\n\
+Looks for non-optimal subsequences and replaces them to shorten the given\n\
+sequence. By default it tries to shorten every subsequence of up to 10 moves,\n\
+but this can be change with the \"b\" option.\n\
+It outputs at most 10 equivalent optimal sequences for each replaceable part.\n\
+\n\
+OPTIONS\n\
+b=N                Finds non-optimal subsequences of up to N moves.\n\
+\n\
+EXAMPLES\n\
+replace D2 F' D2 U2 F' L2 R2 U' D B2 D B2 U B2 F L2 R' F' D U' \n\
+  Produces the following output:\n\
+Replace [ R2 U' D B2 D B2 ] (moves 7-12) with: [ D R2 D U' ] (-6+4)\n\
+Replace [ R2 U' D B2 D B2 U ] (moves 7-13) with: [ D R2 D ] (-7+3)\n\
+Replace [ U' D B2 D B2 U ] (moves 8-13) with: [ R2 D R2 D ] (-6+4)\n\
+\n\
+"
+},
+
+{ "save",
+"\
+\n\
+HELP PAGE FOR COMMAND save\n\
+\n\
+SYNTAX\n\
+save [MOVES|@ID|$ID]\n\
+\n\
+DESCRIPTION\n\
+Memorizes the scramble specified by MOVES, given as input or temporarily saved\n\
+as @ID, where ID is a number ('help nissy' for for more on IDs). If an $ID is\n\
+given, it makes a copy of the scramble. An identifier of the form $ID, where ID\n\
+is a number, is assigned to the memorized scramble.\n\
+\n\
+EXAMPLES\n\
+save R U R' U'\n\
+  Saves the scramble R U R' U'.\n\
+save F (B)\n\
+  Saves the scramble F (B) (NISS notation).\n\
+save @3\n\
+  Saves the third output sequence of the last command.\n\
+save $2\n\
+  Makes a copy of the second saved scramble.\n\
+\n\
+"
+},
+
+{ "scramble",
+"\
+\n\
+HELP PAGE FOR COMMAND scramble\n\
+\n\
+SYNTAX\n\
+scramble [OPTIONS]\n\
+\n\
+DESCRIPTION\n\
+Produces a random-state scramble. There are options to get a corners-only,\n\
+edges-only or dr-state scramble.\n\
+\n\
+OPTIONS\n\
+c                  Scrambles corners only (edges are solved).\n\
+e                  Scrambles edges only (corners are solved).\n\
+dr                 DR-state scramble. The DR is always on the U/D axis.\n\
+\n\
+\n\
+EXAMPLES\n\
+scramble\n\
+  Gives a random-state scramble\n\
+scramble dr\n\
+  Gives a random-DR-state scramble\n\
+\n\
+"
+},
+
+{ "solve",
+"\
+\n\
+HELP PAGE FOR COMMAND solve\n\
+\n\
+SYNTAX\n\
+solve [MOVES|$ID|@ID]\n\
+\n\
+DESCRIPTION\n\
+Solves the given scramble, which can be given as a sequence of moves or as $ID\n\
+or @ID. If none is given, the user can type it on the next line.\n\
+The algorithm first tries to find a short (<=10 moves) solution, and then\n\
+switches to a 2-step algorithm (unless the option \"o\" is specified, in which\n\
+case it keeps looking for an optimal solution).\n\
+The first time it uses the 2-step algorithm it needs to load some tables, which\n\
+can take a few seconds. It runs much faster after that. If the option \"o\" is\n\
+specified, the first time it loads some large tables, which can take a minute\n\
+or two.\n\
+\n\
+OPTIONS\n\
+b=N                Only looks for solutions up to N moves.\n\
+n=N                Tries to find multiple solutions, at most N. Multiple\n\
+                   Solutions will only be found if they are <=10 moves.\n\
+o                  Looks for optimal solution.\n\
+\n\
+\n\
+EXAMPLES\n\
+solve R' U' F\n\
+  Solves the scramble R' U' F.\n\
+solve o b=14 $1\n\
+  Tries to solve the scramble $1 optimally, but stops if no solution of 14\n\
+  moves or shorter is found.\n\
+solve n=16 R L' U2 R' L F2\n\
+  Finds the 16 shortest solutions for the scramble above.\n\
+\n\
+"
+},
+
+{ "unniss",
+"\
+\n\
+HELP PAGE FOR COMMAND unniss\n\
+\n\
+SYNTAX\n\
+unniss [MOVES|$ID|@ID]\n\
+\n\
+DESCRIPTION\n\
+Removes NISS from a sequence of moves, which can be given also as $ID or @ID.\n\
+A sequence of the form A (B) is translated to B' A.\n\
+\n\
+EXAMPLES\n\
+invert F R (D' L2)\n\
+  Prints L2 D F R\n\
+\n\
+"
+},
+};