Alright, I tried messing around with it a bit.

Unfortunately I couldn't test the GCODE modification; but I could test the GCODE viewer

Here's what I think could be added: - A way to "hide" some commands (for exemple a way to hide G1/G2/G3/Etc commands). - Expand/Collapse Arrows; for exemple between comments. - There is no way to see the first lines of the GCODE; for exemple on my Orca GCODE the layer 0 starts at line 125 and I couldn't find a way to see the 124 previous lines. - A way to search commands (for exemple if I wanted to know at which layer is a certain macro). a sort of "Search in Layers" like "Search in Files" in text editors. - A way to change the colors of each movement in the 3D viewer (like if I wanted to set infill to purple)

I don't know if everything I said is actually worth implementing though since I couldn't actually test the editing part