ACU Revit common mistakes
ACU Revit · Understand the traps and how to avoid them.
Clicking a tool and then clicking in the drawing before checking the Options Bar, so a wall is drawn with the wrong height, location line, or chain setting.
Revit tools are modal: the Options Bar changes with the active command, and candidates coming from other CAD tools expect to set properties after drawing rather than before. The first click commits defaults that are easy to miss.
What to do instead
Before the first click of any creation command, read the Options Bar left to right and confirm height/constraint, location line, and chain option; press Escape and restart the command if the wrong default was used rather than trying to fix it afterwards.
Drawing walls with the wrong location line, so dimensions taken to wall faces do not match the design intent and rooms come out undersized or oversized.
The location line determines which wall reference the cursor follows; the default (wall centerline) is not always what the plan dimensions reference, and the setting is silently retained from the previous session.
What to do instead
Check the Location Line control in the Options Bar before drawing and switch to Finish Face Exterior or Core Face as the plan requires; verify with a temporary dimension while the wall is still selected.
Editing a type parameter (for example wall height or type mark) inside the Properties palette when the intent was to change only the selected instance, altering every instance in the project.
The Properties palette shows both Type and Instance parameter groups, and the Edit Type button opens a separate dialog that candidates either overlook or open by accident, so changes propagate project-wide.
What to do instead
Before typing a value, confirm which group the parameter sits in; use Edit Type deliberately when a type change is wanted, and use instance parameters or element overrides when only one element should change.
Creating a new family or component by drawing model lines in the project instead of loading or building a proper family, so the element cannot be scheduled, tagged, or scheduled by category.
Model lines and detail lines look correct in a view, and candidates under time pressure take the fastest visual route without considering that annotation and schedules depend on real category-bearing elements.
What to do instead
Ask whether the item must appear in a schedule or carry a tag; if yes, place a component or build/load a family of the correct category, and reserve model and detail lines for non-modeling graphic purposes.
Placing tags or dimensions and then moving the tagged element, expecting the annotation to follow, or deleting an element and leaving orphaned annotation.
Revit annotation is view-specific and associative only when it references an element; candidates treat tags like drawn text and assume a fixed relationship, or they delete geometry without checking the annotation state.
What to do instead
Tag and dimension real elements so the annotation is associative, then move the element and confirm the tag follows; when removing geometry, check the view for dangling annotation and delete it deliberately.
Duplicating a view and expecting annotation, crop changes, or visibility overrides made in the copy to stay independent, or the reverse: making changes in a duplicate and being surprised the original changed.
Duplicate, Duplicate with Detailing, and Dependent views copy different amounts of view-specific content, and the naming of these options is easy to conflate under exam pressure.
What to do instead
Learn the three duplication modes by what they copy: Duplicate copies the model with no annotation, Duplicate with Detailing copies annotation, and a dependent view shares the crop and settings of its parent; choose based on whether the new view must share or diverge.
Placing views on sheets and then editing the model in the sheet view, or dragging a viewport to resize it instead of editing the view's crop and scale.
A sheet is a composition surface showing live views; candidates treat it like a drawing canvas, and viewport handles invite dragging that changes placement rather than the underlying view extent.
What to do instead
Open the view itself (double-click the viewport or use the Project Browser) to change crop, scale, or content; on the sheet, use the viewport's title and type properties to control labeling and only drag to position.
Building a schedule and finding elements missing because the schedule category, phase, or filter does not match, then adding elements to fix it rather than correcting the schedule.
Schedules report only elements of the chosen category that pass the schedule's filters and phase; candidates assume a schedule shows everything and misdiagnose the cause as missing model content.
What to do instead
Check the schedule's category, filters, sorting, and phase first, and confirm the elements' own parameters satisfy the filter; only add model content once the schedule definition is verified.
Editing a value directly in a schedule cell that is a calculated or read-only field, or expecting a schedule edit to change a type parameter for all instances.
Some schedule fields are computed and cannot be typed into, while others write back to the model with instance- or type-level consequences that are not obvious from the schedule grid.
What to do instead
Identify which fields are calculated (greyed or formula-driven) before editing; when a change must apply to all instances, edit the type instead, and verify the model after any in-schedule edit.
Setting up sheets and title blocks without checking the project units, scale, and annotation size, so printed output has text at the wrong size or dimensions showing unintended precision.
Annotation size is paper-based and scale-dependent, and project units are a project-wide setting; candidates focus on content placement and discover the output problems only at print or export time.
What to do instead
Before laying out sheets, confirm Project Units and the view scale, place a test tag and dimension at final scale to judge legibility, and check the title block's parameters and sheet size against the intended output format.