how to 'cancel' automatic standby while reading? I look for an app/a setting that allows me to cancel/revert (automatic) standby more easily than by pressing the power button.

I think of something like turning off the screen for a few seconds before standby, so i can cancel it by tapping the screen.
Similar like the lock screen kicks in only a few secs after standby.

WHY?
When reading eg. webpages, automatic standby can be annoying. I need  to press power, thats annoying. I don't want to change the standby timeout either.

I don't want an app that permanently allows wake by tap/shake/proximity, as this potentially eats battery and unwanted wakeups.
Also, an app to disable the auto standby is not good, i want the standby to still kick in, eg. If i fall asleep.
If what you want is to keep the screen on while a certain app is running in foreground, there are several apps around which can help you out. I personally use tasker for this (ever since I bought the app years ago) successfully with a recipe that rawly reads:


Condition: App (select the apps concerned)
Task: Display timeout (set higher, or disable it completely)


Done. While my default timeout is something like 1 minute, whenever e.g. I read my RSS feeds it kicks in only after 5 minutes – which is perfectly fine, as if I didn't touch the screen within that time I'm not really reading ;)

If you don't feel like buying Tasker for 5 bucks (it's definitely worth the price: just follow the tag link to see what other uses it might have. Sometimes it feels like every second question here can be answered with "Tasker!"), there are plenty of apps specialized on this, usually having "Keep Screen" in their names.