From the next nightly build, pressing the ; (semicolon key) will toggle a mode that hides buildings in the immediate vicinity of the cursor. This mode has been available for a long time, but only accessible through menus. Having this available via a keyboard shortcut should make things easier for players.
Thank you for this addition; it seems quite useful at first glace. The Quick Reference Guide (https://app.box.com/s/3d3mk13yslvjfd9i9j65x4rc2t96gyyj) has been updated accordingly.
Splendid, thank you!