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To add an ordinate dimension for a linear dimension style, you need to edit the Dimension String type parameter. Create a new ordinate linear dimension style so that any continuous dimensions in the project are not affected when you edit the parameter. Click Annotate tab Dimension panel   (Aligned) or   (Linear). Click Modify | Place Dimensions tab Properties panel  (Type Properties). In the Type Properties dialog, click Duplicate. In the Name dialog, enter a name for the dimension, and click OK. In the Type Properties dialog, for Dimension String Type, select Ordinate. For Ordinate Dimension Settings, click Edit. In the Ordinate Dimension Settings dialog, specify settings for the ordinate dimension. Setting Description Text Orientation Specify where to align the dimension text, with the witness line or the dimension line. This setting is disabled when the Read Convention parameter is Horizontal. Text Position Specify the text position, at the end of the witness line or

Create a toposurface by placing points, by using imported 3D contour data, or by using a points file. Open a 3D view or a site plan view. Click Massing & Site tab Model Site panel  (Toposurface). To create the toposurface by placing points By default, the Place Point tool on the ribbon is active. On the Options Bar, set a value for Elevation. The points and their elevations are used to create the surface. Next to the Elevation text box, select one of the following: Absolute Elevation . Points display at the specified elevation (from the Project Base Point). You can place points anywhere in the active drawing area. Relative to Surface . Allows you to edit an existing toposurface by placing points on it at the elevation you specify. To use this option effectively, you may want to work in a shaded 3D view. Click in the drawing area to place points. If needed, change the elevation on the Options Bar as you place additional points. To use imported 3D contour data

Automatically generate a toposurface based on 3D contour data imported from DWG, DXF, or DGN files. Revit  analyzes the data and places a series of elevation points along the contour lines. When importing contour data, follow these requirements: The imported CAD file must contain 3D information. In the CAD file to import, each contour line must be positioned at the correct "Z" value. When importing the CAD file into  Revit , do not select the "Current View Only" option. To create a toposurface by importing contour data Open a 3D view. Click Massing & Site tab Model Site panel  (Toposurface). On the Modify | Edit Surface tab, click Tools panel Create From Import drop-down  (Select Import Instance). Select the imported 3D contour data in the drawing area. The Add Points from Selected Layers dialog displays. Select the layers to which you want to apply elevation points, and click OK. Source : https://knowledge.autodesk.com/s

Many of the controls and tools that you use to modify an element in the drawing area are only available when an element is selected. To help you identify elements and mark them for selection,  Revit  includes an automatic highlighting feature. When you move the cursor onto or near an element in the drawing area, the outline of the element is highlighted. (It displays in a heavier line weight.) A description of the element displays on the status bar at the bottom of the Revit window. After a brief delay, the element description also displays within a tool tip just below the cursor. Wall element before and after highlighting When an element is highlighted, click to select it. When an element is selected in one view, the selection applies to all other views as well. Tip:  If you have difficulty highlighting a particular element because other elements are in close proximity, press  Tab  to cycle through the elements until the desired element is highlighted. The status

Slanted structural columns are becoming more common in large, high profile structures. These have been implemented in  Revit  to help engineers incorporate this functionality into their drawings and allow proper analysis calculations. The following general rules apply to the procedures for placing slanted columns. When placing slanted columns, the top of the column will always have a higher elevation than its base. When you place the column, the endpoint at the higher elevation is the top, and the lower elevation is the base. Once defined, the top may not be set below the base. When placed in a 3D view, your 1st Click and 2nd Click settings define the associated levels and offset of the column. When placed in an elevation or cross section, the endpoints associate with their nearest level. The distance between the endpoint and the elevation are the offset by default. If 3D Snapping is disabled, snap references for elements not on the current work plane display, as well as typic

Add a linear dimension to a drawing to measure between 2 points. Click Annotate tab Dimension panel  (Linear). Place the cursor at a reference point on an element, such as a wall or a line, or at the intersection of references, such as a join between 2 walls. The reference point highlights if you can place the dimension there. You can switch through the different reference points of intersections by pressing  Tab . Click to specify the reference. Place the cursor on the desired location of the next reference point, and click. As you move the cursor, a dimension line appears. You can continue to select multiple references, if desired. After selecting a second reference point, press  Spacebar  to align the dimension to the vertical or horizontal axis. When you have reached the last reference point, move the cursor away from the last element, and click. The dimension displays. Source : https://knowledge.autodesk.com/support/revit-products/learn-explore/caas/CloudH