As of

ZC Editor
Version: 2.55 Nightly (Alpha 119/120)
Tag: 2.55.0 Nightly (Alpha 119/120)
Build Date: 19th February, 2024 at @ 14:57:04 EST
Dev Signoff: UNSIGNED
QR:##B343AFAF01C281A00DA58A4211A608DFDF080001362A0 410FC5306FE2A274100381B02044031300000065824C000000 00000D00323010900000000000000000000000000000000000 00000000000000034866C31403202000000000000000000000 00000##
going to Tools->Preview Mode brings up what appears to be a broken menu (File, Quest, Edit, View); all the options appear to do nothing. The top-leftmost 4x4 block of tiles on the current screen is also mostly visible below this menu.

According to the first screensnip in "Part 13: Preview Mode" of http://zcguides.celestialrealm.net/t...s/main/ch02-06, an 'X' should appear to the right of Tools->Preview Mode; this also appears to be gone.

Workaround: pressing 'X' on your keyboard while editing still works