Starting from here: #14478 (comment)

Issue on hand: KOReader doesn't explicitly explain that 1) some items can be long pressed for more options; 2) which items are long-pressable; 3) which action will be taken as a result - a) making settings a default, b) showing an info text message with details, c) take immediate action (restart KOReader or apply profile).

Frequency/severity: moderate. Comes up a couple times a week on various forums/discord/reddit/Github. However, this feature alone is the reasosn why KOReader is currently mostly on the "nerdy" side of things :D Not saying this is good or bad.

Current design language and paradigm: treat KOReader's touch screen UX as usual as computer where, say, right-click isn't explicitly explained neither. Let users "find out" by messing around, asking on forums or ChatGPT, try and long pressed everything and remember.

Currently suggested ideas so far:

• Add a visual indicator next to menu items with long-press capability. Rejected by devs and long-term users because it clutters the interface
• Underline first letters of such long pressable items similar to UX in PC windows design (shortcut hints). Rejected because this is used to suggest a specific key as a shortcut which won't be the case in KOReader
• Make this optional and turned on by default only for newcomers. No acceptance/rejection yet
• Add a text explaining this feature only in one menu. Rejected as well
• Make bold the sentence about long press in Quick Start guide welcoming newcomers
• Go around and make ALL items long pressable.

Any more ideas are welcome!