The panel arrangement within the Designer is saved per user.
You can open a second sidebar on the right side of the editor, and use both side bars to arrange the Designer panels.
If you want to resize the editor, drag the handle in the middle of each border to make the editor pane larger or smaller.
Click the handle to close the sidebar, and maximize the editor to this side of the application.
In the BPMN editor, you have another option:
To gain more space for modeling, you can hide the whole execution pane by clicking the icon from the model toolbar.
Depending on which editor you are currently using, there are different Designer Panels available. You can show and hide the panels and also rearrange them. The panel settings are saved for each user: Your preferred settings will be displayed in every editor of the Designer.
You can distinct the different panels by their icons:
The Service Panel is the only immutable panel: Users can neither close it nor move it. It is always displayed at the top of the left panel area. Got to Service Panel for further information.
All panels are available in each editor. If they have no function for a diagram type, a corresponding message is displayed in the panel.
Use the left and the right sidebar in the editor to arrange the Designer panels.
You can hide panels that you do not currently need. The icons of hidden panels are displayed in the right upper corner of the editor.
To show a hidden panel again, click on its icon. Hover over an icon to show the name of the corresponding panel. The panel is inserted at the position where it was last visible.
Use drag & drop to rearrange panels.
You can move panels to already existing columns. The new panel is then shown as a new tab.
You can also arrange the panels individually.
The dashed frame indicates the new position of the panel.
It is also possible to resize panels by dragging the vertical or horizontal panel borders.