AddToSelection loads additional reference Users (or Groups or Sites) and their related data into the grid.
True/False (defaults to False)
For instance, if you have loaded the events for some users, you can add other users to the same grid by using AddToSelection.
Some selection code must be enclosed within the AddToSelection tag.
The selection code is a set of Select tags with ColumnID & Value attribute pairs, or through the standard SetParam notation (as detailed in Select: Select Rows).
The corresponding Column ID as shown in the Grid Manager
OR these set values
The value to use as selection criteria
Acceptable values for checkbox cells
See SelectedGroupMemberAdd: Add members to Groups for more info.
<Select columnID='id' Value='ae175f35-b21b-48b1-9398-be0ddcd40bac'/>