Bresser T-Rex Instruction Manual page 37

Main Interface Overview
The screenshot below shows the three main elements of the software - the
Menus, the Icons, and the Build Plate.
The icons have the functions listed in the table below.
Load
Loads a model or Gcode file. REXprint supports .STL, .OBJ, and .FPP
model files.
You can also load a .PNG, .JPG, .JPEG, or .BMP file and REXprint will
generate a model from the image. See the Generating a Model
section for details.
Supports
Enters the Support Edit mode.
Print
Prints directly from REXprint via a USB or wireless connection or
exports a Gcode file to the SD™ card.
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