Is it possible to change the amount of space snaplines put between controls in a WinForms project in Visual Studio?
For example, when I slide a textbox up to another
There are no snaplines that help you set the spacing between controls, they assist in aligning control edges and text. Instead, the designer pays attention to the Margin property of the control. The default for a Button is (3, 3, 3, 3), it will snap in place creating a 3 pixel gap from the adjacent control.
Best to try it yourself. Drop a label and a button, change the button's Margin to (3, 10, 3, 3) and move the Button below label up and down. You'll see it now snaps in place creating a 10 pixel gap.