Add dimensions in Revit

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Dimensions are annotation elements and are view specific.

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That is, they are only visible in one view, as opposed to model elements which are visible in all views.

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On the Annotate tab, select the Align Dimension tool.

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On the options bar, the placement settings specify which part of the walls you want to dimension from, and to;

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in this case, wall faces.

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When the cursor is moved over a wall face, it is highlighted, and you click to select it.

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When another parallel wall face is selected, the dimension string displays.

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Then, the third click places the dimension string.

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The lock icon that displays near the dimension string can be clicked to establish a constraint between the dimensioned objects.

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Next, the position of the grid lines will be established with the aligned dimension tool still active,

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change the pick option on the options bar to entire walls.

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Then click Options to set the elements in the wall we want to dimension.

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In this case, we want the intersecting grids.

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With entire walls set as the option, you only need to select the wall, and the elements in the options are automatically dimensioned.

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Dimension strings from other walls will snap into position.

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Next, using the entire wall setting, select openings and the center points.

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Now, when the wall is selected, the center points of the openings in the wall will be added as dimension points.

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Continue to add dimension strings on the views of the model to document for construction.