Instead of styling every shape individually, you can style one, then apply that style to multiple selected shapes via the format panel.

  1. Update the style of one of the shapes or connectors in your diagram. Note that shape and connector styles must be copied and pasted separately.
  2. Select that shape or connector, then in the Style tab of the format panel, click on Copy Style.
  3. Select the other shapes or connectors that you want to apply this style to. In the Style tab, click on Paste Style.


Tip: There are many shortcuts for working with styles in diagrams.net.