I'm trying to scale something but I want a corner of it to stay still like I want to scale it from a single point/vertex.
2 Answers
To add to MikoCG's answer, you can also select all your vertices, select the one you want to make active at last, in the Transform Pivot Point panel choose Active Element, scale:
Well I recommend to just use cursor this way: This is your plane with 4 vertices
Select your vert you want to use for scaling and press Shift+S to open this menu and select Cursor to Selected:
Now you need to change Transform pivot point to 3D cursor
Select all and press S to scale
That's it