I can suggest any new player to directly switch his keyboard settings to grid optimized. This will help you later be more efficient and you won't have to relearn hotkeys.
If you want to customize they keymaps follow this guide:
Guide for changing keymappings (by Brightworks)
https://www.youtube.com/watch?v=ACW7-saEVeM
https://github.com/resopmok/BAR_uikeys_collections/blob/main/HOWTO_customkeybind.md
https://github.com/resopmok/BAR_uikeys_collections/blob/main/README.md
unbindall
bind Ctrl+sc_z areamex
keyload luaui/configs/hotkeys/grid_keys.txt
https://github-wiki-see.page/m/beyond-all-reason/Beyond-All-Reason/wiki/Hotkeys-Editor (not implemented? don't know how to start it!)
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ALT+f
/widgetselectorrec