[DONE] persistent entries in klipper history

[doktor5000]

is it possible to have some lines always at the top, not dropping down in the list as time goes by, on Klipper?

[doktor5000]

Nope.

[n00biest]

well
it's a pity

[doktor5000]

You're asking the question at the wrong place, try https://forum.kde.org/ or suggest it at https://bugs.kde.org/ as enhancement request for KF5.
But klipper is just a clipboard (history) manager so it doesn't make sense to add any persistent entries there. Use something that allows you to add text templates/clippings.

As you don't mention what you need this for can't help you further.

[n00biest]

for thing as simple as an email adress that i write here and there 5 or 6 times a day ...

[jiml8]

Bind it to a hotkey combination.