You can control or define the size of the form in either of two
ways:
Click and drag any of the three handles located on the right
and bottom edges and the lower right corner of the form, which always remains
pinned to the top left corner of the Design
Canvas.
To set precise dimensions in pixels, enter the desired values
for the Size property in the Properties
view.
Note: The Minimize,
Maximize, and Close buttons that appear by default in the
window control box at the top right corner of the form are run-time
features; they are not functional at design time. You can enlarge or
maximize the editing window if you need more space for the Design Canvas. You can also Use the Toolbox.