google docs
Is there any way to integrate hint machinery similar to the one used on puzzling.stackexchange.com inside a Google Docs?
That is, I want that hidden text is revealed after a certain user request (as a mouse hovering).
The optimum would be to record and store such requests.
In short, yes!
Assuming you have a second language installed on your machine, you should simply be able to toggle to it normally. According to my experience Google Docs will automatically support it if your OS does. You can toggle back and forth at will (usually Cmd+Space on Mac, Alt+Shift on Windows, and user-defined on Linux) as you would in any other document.
You can use Yet Another Mail Merge to produce what appears to be line breaks by breaking up the message content into different columns.
Wherever you need to see a line break, insert a column with a Break # header. The cells below the header in that column should be blank.
In Google Sheets for instance, your columns might end up looking like this:
Email Address, P1, Break 1, P2, Break 2, P3, Break 3 and P4
In Gmail, compose the draft message like this. Also, make sure the font size for the breaks is set to small.
Send yourself a test to verify. Here's the result I got with this configuration.
Best Answer
Similar to
>!(Markdown that is also available to Web Applications by the way) in my opinion would be to use a font colour the same as the background:At the top is the normal view and below that after selection.