PDF (adobe.com)

Resize panel groups

When you position the pointer over dividers between panel groups, resize icons appear. When you drag these icons, all groups that share the divider are resized. For example, suppose your workspace contains three panel groups stacked vertically. If you drag the divider between the bottom two groups, they are resized, but the topmost group doesn’t change.

To quickly maximize a panel beneath the pointer, press the tilde (~) key. (Do not press Shift.) Press the tilde key again to return the panel to its original size.
  1. Do either of the following:
    • To resize either horizontally or vertically, position the pointer between two panel groups. The pointer becomes a double‑arrow .

    • To resize in both directions at once, position the pointer at the intersection between three or more panel groups. The pointer becomes a four‑way arrow .

  2. Hold down the mouse button, and drag to resize the panel groups.
    Dragging divider between panel groups to resize them horizontally

    A.
    Original group with resize icon

    B.
    Resized groups