Controlling Level Display

Use the Level Display dialog box to turn the display of levels on or off on a model by model basis.

If you neglect to save settings in the open DGN file before closing it, changes to its models' level display settings will not be in effect the next time you open the file.

To open the Level Display dialog box

1. Click the Level Display icon on the Primary Tools tool box.
   or
   Press <CTRL-E>.
   or
   From the Settings menu's Level submenu, choose Display.
   The Level Display dialog box opens listing levels in the open DGN file.

   Level Display dialog box




A dimmed entry in the tree indicates that the display of that reference is turned off.

To toggle the display of levels for references

1. In the Level Display dialog box, click the Show Target Tree icon to turn on the display of the target tree.


2. Select the references in the target tree.
   The levels in the chosen reference display. Notice the File and Logical columns display the reference name and logical name.


3. Click a level that is being used (i.e., highlighted with a dot in the Used column) in the open DGN file to toggle the level on/off.
   If the level is on, the dot changes from white to black. If the level was off, the dot changes from black to white.

To toggle the display of levels in all views

1. Right-click any of the view buttons and choose Select All Views.


2. In the list box, click a level(s). You can click only those levels that contains elements, indicated with a dot in the level's Used column.
   The display of the select level toggles to its opposite state (on/off) in all views. If the level was on, the dot changes from white to black. If the level was off, the dot changes from black to white.

To toggle the display of a level in all views in all models stored in the open DGN file

1. In the Level Display dialog box, choose Global Display from the Mode option menu.


2. Select the level.
   The display of the selected level toggles (on/off) in all views in all models.
   This has the same effect as toggling the check mark in the Global column on the Level Manager dialog box.



All views have the same levels on/off while Mode is set to Global Display in the Level Display dialog box.

To toggle the display of a level in all views in all models using the Active Level combo box

1. In the Level Display dialog box, choose Global Display from the Mode option menu.


2. In the Attributes tool box, click the Active Level combo box .
   The levels in the open DGN file are listed.


3. Click the check mark next to the level on which you want to change the display.
   The check mark changes to a circle indicating the level display is off. To turn the display back on, click the circle so the check mark reappears.



You cannot turn off the display of the Active Level if the Display Active Level in All Views preference is on in the Operation category of the Preferences dialog box (Workspace > Preferences).

To change the display of levels graphically

1. In the Level Display dialog box, select the Change Level tool.


2. Identify an element residing on the level for which you want to change the display setting.


3. Enter a data point anywhere in any view except on an element to accept the element.


4. In the Change Level settings window, choose Display Off from the Level option menu to turn off the level(s) of the identified element.
   or
   Choose Display Only from the Level option menu to display only the level(s) of the identified element.
   or
   Choose Lock from the Level option menu to lock the level(s) of the identified element.
   or
   Choose Unlock from the Level option menu to unlock the level(s) of the identified element.

Alternative Method — To change the display of levels graphically

1. Select or fence an element(s) residing on the level(s) for which you want to change the display setting.


2. In the Level Display dialog box, select the Change Level tool.


3. Continue with step 4 in the primary method for this procedure described above — the option you choose in the Level option menu will operate on the selected or fenced element(s) rather than the identified element.

Filters are useful for grouping associated levels for the purposes of viewing or not viewing as a group.

To toggle the display of a set of levels using filters

1. In the Level Display dialog box, choose the List Filters icon.
   All filters in the open DGN file are listed.


2. Choose the filter to be applied.
   Levels that meet the filter criteria display.


3. In the list box, click a level(s). You can click only those levels that contains elements, indicated with a dot in the level's Used column.