Function Block Diagram (FBD)ΒΆ

The FBD editor has a tree-oriented selection. By selecting one box in the tree, all elements to the left of it are selected, too.

In the screenshot below, the variable b3 is selected.

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In the screenshot below, the variables b1 and b2 are selected.

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Right-click onto the selected variables to open the context menu and adding them to a watch window.