The UI Designer’s Palette can be resized vertically or horizontally. The UI Designer provides two methods to resize the palette.
A click on the edge of the Palette converts the pointer into a horizontal bi-directional arrow indicating you can drag the divider bar to resize the Palette.
Figure 1 - Click and drag the edge of the palette to resize
OR
The inner side of the Palette is highlighted and the pointer changes to a horizontal bi-directional arrow and jumps to the top of that edge. Move the pointer to chosen size and release. The Palette area expands to the new size.
Figure 2 - Right-click the Palette title bar