New devices / functions can be placed in the schematic during the Insert > Symbol procedure without automatic DT assignment . In this case, the entries for the displayed and full DT remain empty.
Precondition:
You have opened a project.
- Select the following commands: File > Settings > Projects > "Project name" > Devices > Numbering (online).
 - Under On symbol insertion, select the Empty field option.
 - Click [OK].
 
Insert a device / function via a symbol without DT
- Select the following commands: Insert center > Breadcrumb trail Home > Symbols. Using the folder structure navigate to the desired symbol and select it by clicking the preview tile.
 The symbol hangs on the cursor. - Move the cursor to the desired location on the schematic page.
 - Click the page to place the symbol.
 The Properties (components): <...> dialog opens. There is no DT entry in the Displayed DT field. - Click [OK].
 The symbol is placed without DT. 
Create a device / function without placement and without DT
- Select the following commands: Tab Devices > Command group Devices > Navigator.
 - Select the Tree tab.
 - Select the project level.
 - Select the New popup menu item.
 - Select a function definition in the Selection field of the Function definitions dialog and click [OK].
 The Properties (components): <...> dialog opens. There is no DT entry in the Displayed DT field. - Click [OK].
 The device / function is sorted into the tree structure level without DT. 
See also
Specifying Online Numbering Format
Automatically Numbering New Devices