How does one property forma a warframe?

So I wanna forma my hydroid/limbo

So when I forma and I click like the mod slots these weird symbols appears and it just confused like it gives me options and idk what to do.

Can someone help me?

submitted by /u/Bluetar67
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source https://www.reddit.com/r/Warframe/comments/t4lide/how_does_one_property_forma_a_warframe/