Do mind that the units from 3rd group (or row) are not displayed in the post-game stats becouse relic devs didn't change that view when adding brits.
The option the add it to the buildlog is called "show_in_build_log" in sbps.
a. What determines wether a symbol is in the first or second row ? and How can I mod that ?
I've always cloned existing units so I don't know exactly what triggers this. But I just had a look through the files and maybe this is linked with ebps/ui_ext/kill_type. It seems that all my 3rd row units have the value 'building'.
b. Do the symbols that appear in the upper side of the screen work only with sbps ? or could it be moddable for ebps also ?
This works only with sbps indeed, but I managed to link a building with sbps. The ebps file should have the team_weapon category and the construction_squad must link to the sbps file. The team_weapon_type is 'stationary'. This sbps file has only the following categories:
c. I built a bunker entity and now I want to give it a symbol. Then we created an sbps for it and tried in many ways to add a symbol but we failed. The idea is this symbol should appear in the upper side of the screen to be selected in a easy way during the game.
I answered this at b. The game thinks your building is now a stationary team weapon
. I haven't encountered any consequences of this, it acts like all other buildings.
Good luck!