Voidstones, compass and sextant - a mystery

Hi there,
I should mention first that I'm German. My English is pretty good, I think, but all the texts (in-game and here in the forum) surrounding the compass/sextant thing make no sense to me...
Surveyor's compass reads "stores a sextant modifier in an Item" Errrr, what? I only know the awakened sextant, but that doesn't have mods... Even worse is the text at the bottom: A to select, then A on a voidstone to itemize an applied sextant modifier". Honestly, I couldn't understand less if was written in suawheli lol. Then the awakened sextant: "adds or relolls a modifier on a voidstone"... Errr??? I have 2 different voidstones, both have one mod, the 25% chance for higher tier maps, so whats to reroll or add there?

You can apply sextants to voidstones like you do alchemy orbs or chisels to maps. It will give the voidstone a random modifier that will affect all maps. It has 3 uses and will have one use consumed every time you run a amp.

The compass allows you to store the modifier rolled on a voidstone once you have used a sextant on a voidstone.

Wow, that was fast... Thanks, I tried it and get it now... Thanks a lot!