When you push Y on a Tank in the Tech Tree, you get access to 3 tabs:
Modules - Showing the tank's modules, like the gun stats, crew locations, engine stats and location, etc.
Armor - showing colored regions of armor
Overview - showing the Tank's history blurb, visual model, and base stats.
But when you select one of your own tanks in the Garage, you lose access to the Overview tab. This might not be a huge issue, but its useful to be able to cycle from the Overview to the Armor tab to see which parts of a tank aren't hitboxes(like the T-29's ears or the front miniguns on the Japanese heavies, some soviet/chinese fuel tanks, etc)
And you also can't access the Historical info that way for your own vehicles.
Can the Overview tab be enabled from the Garage please?