for fff printers:
- "print.ui" for the Print Settings tab
- "filament.ui" for the Filament Settings tab
- "printer.ui" for the Printer Settings tab
for slaprinters:
- "sla_print.ui" for the Print Settings tab
- "sla_material.ui" for the Filament Settings tab
- "sla_printer.ui" for the Printer Settings tab If a ui file isn't here, it will build the tab with the default (harcoded) layout.

syntax

The tree is composed of page, group, lines and settings A group has to be inside a page. A line has to be inside a group. A setting has to be inside a group or a line. Each object has parameters

syntax of each object

STR represent a label that can conatins any character but ':', leading and trailing space and tabs are removed. INT represent an integer parameters that are inside [] are optionals each parameter is separated by ':'

Page: page[:idx]:STR:STR
- first STR is for the label and the second for the icon, with or without the .svg / .png
- idx: append the index of the page (for extruder ui) to the name
Group: group[:nolabel][:title_width$INT][:label_width$INT][:sidetext_width$INT][:EVENT][:id$INT][:idx]:STR
- EVENT can be extruders_count_event if the group contains extruders_count and is a printer tab ; silent_mode_event if the group contains silent_mode and is a printer tab ; material_density_event if the group contains material_density.
- title_width$INT is used to set the size of the left column, where labels are draw.
- label_width$INT is used to set the size of the labels on lines.
- sidetext_width$INT is used to set the size of the suffix label (see sidetext in setting).
- EVENT can be extruders_count_event (TabPrinter only), silent_mode_event (TabPrinter only), material_density_event.
- nolabel is used to remove the left column, where labels are draw.
Line: line:STR*
setting: setting[label$STR][label_width$INT][:full_label][:full_width][:sidetext$STR][sidetext_width$INT][:simple|advanced|expert][:width$INT][:height$INT][:id$INT]:STR
- STR, the last parameter: the id name of the setting.
- label$STR: to override the label by this new one (if it ends with '_' it won't have a ':' ; if empty it won't have a length).
- label_width$INT: change the width of the label. Only works if it's in a line. Override the group one. -1 for auto.
- full_label$STR: to override the full_label by this new one (full_label is used on modifiers).
- full_label: to override the label by the "full one".
- full_width: to tell to create a field that span the full width.
- sidetext$STR: the suffix at the right of the widget (like 'mm').
- sidetext_width$INT: the suffix label length (override the group one). -1 for auto.
- simple|advanced|expert: add one of these to modify the mode in which this setting appear.
- width$INT: change the width of the field. Shouod work on most type of settings.
- height$INT: change the height of the field. Don't works with every type of setting.
- precision$INT: number of digit after the dot displayed.
- url$STR: the url to call when clicking on it.
- id $INT: for setting only a single value of a setting array.
- idx: for setting only a single value of a setting array, with the index of the page (for extruder ui page)
recommended_thin_wall_thickness_description: create a text widget to explain recommended thin wall thickness (only in a fff print tab).
parent_preset_description: create a text widget to explain parent preset.
cooling_description: create a text widget to explain cooling (only in a filament tab).
volumetric_speed_description: create a text widget to explain volumetric speed (only in a filament tab).
filament_ramming_parameters: create a widget for filament ramming.
filament_overrides_page: create a page for overrides (only in a filament tab).
unregular_pages: create needed special pages for a fff printer tab.
printhost: create printhost settings for the group (only in a printer tab).
bed_shape: create bed shape widget (only in a printer tab).
extruders_count: create extruders_count setting (only in a fff printer tab).
logs: activated logs.

ui file syntax

trailing & leading tabs & spaces are removed, so you can indent as you want. If the first character is '#', then this line is ignored You can end page, group and line section by end_page, end_group but it's not mandatory as they do nothing. You have to use end_line because it indicates when the line end and you have to stop adding settings inside. Note that it's added automatically when line, group or page is called.

exemple:

page:my page:my icon name
	group:my group name
		setting:label$Choose your base layer height, if you dare:layer_height
		line:perimeters
			settings:label$count:perimeters
			settings:label$only one is spiral:spiral_vase
		end_line
	end_group
end_page

notes

A print.ui.legacy is here with the prusaslicer tabs, just rename print.ui and remove the .legacy to switch from the Slic3r print layout to prusaslicer print layout.