This firmware implements some special custom C-codes to allow you to configure parameters not available in normal standard Marlin G-codes. You can include them in your G-code scripts or send them to the printer, for the last you need to use a host/terminal with support for non-standard G-codes or create a .gcode file and "print" it.

Note: A special version of Pronterface is needed to support non-standard G-codes: https://github.com/mriscoc/Pronterface-PFEd/releases/tag/PFEd-20230517

• C10 : Mark the g-code file as a Configuration file to avoid confirm to print and print done dialogs (at least one space is currently required after the C10).
• C11 En Rn Gn Bn : colorize UI elements (C11 E0 to update the screen)
• C29 Ln Rn Fn Bn Tn Nn Xn Ym : set probing mesh inset (Left, Right, Front, Back) in mm. T is the probing temperature (T0 doesn't change the current bed temperature) and N is the density or amount of grid points NxN, it is posible to set a NxM density by using X and Y. In UBL use G29 S# to save to a mesh slot number #.
• C35 Launch the bed tramming wizard.
• C100 Xn Yn Zn : setup minimum physical limits
• C101 Xn Yn Zn : setup maximum physical limits
• C102 Xn Yn : setup bed size (can't be larger than physical limits)
• C104 U1 Tn : unlock the maximum hotend temperature temperature to ###°C (limited by thermistor calibration table CAUTION, the stock hot-end doesn't support more than 260°C due to the isolators and PTFE degradation.)
• C108 : cancel screens waiting for user simple confirmation
• C125 Xn Yn Zn : setup the park position
• C250 Pn : enable or disable preview screen (needs PREVIEW_MENU_ITEM)
• C412 Mn : set run-out sensor active state (M0:LOW, M1:HIGH, M2:MOTION)
• C510 Un : lock/unlock the screen (C510 U1 to unlock)
• C562 En : invert the Extruder (E1 to invert)
• C810 An Bn Cn Dn En : sets up the toolbar shortcuts A..E to functions 0..n (0 disable that shortcut)
• C851 Sn [Zn] Mn : Set probe Z feed speed (S) in mm/min, Multiple probing (Mn>1) or disables it (M0), in manual mesh version, Z parameter can be used to set a manual Z-offset.

In UBL versions the mesh parameters are saved in separate EEPROM mesh slots, so to save them use G29 S# when "#" is a slot number. After changing any parameter, send an M500 to save to EEPROM and make it permanent, then reboot the printer to be sure to take any physical change.