Hi everyone,
on desktops, all this functionality is available via hotkeys.
on mobile platforms (Android, iOS), this was available only via additional software (forced on-screen keyboards).
Since OXCE v7.0, the most frequently used stuff is available also via buttons.
The buttons can be enabled via Options > Advanced > Extended links.
The option is enabled by default on mobile platforms.
There is also a hidden option in options.cfg (`oxceFatFingerLinks`), which can be used to switch between long+thin buttons and short+thick buttons.
On mobile platforms, short+thick buttons are enabled by default.
Modders can change the battlescape and inventory button graphics using sprites called `oxceLinks` (32x16) and `oxceLinksInv` (23x22).
The inventory links are fully available in the base, partially available before the mission (briefing), and not available during the mission.
For debug purposes, the battlescape link `Multi-level View` can be replaced by links to activate debug mode and a link to kill all aliens (requires `debug: true` in options.cfg).