Grid Bubble — Show and Hide Ends
Top/Left setting applied; visible bubble-head result remains unverified in the current fixture.

Open the grid bubble dialog
On BimSpeed dot G E N, open Grid slash Level and choose Grid Bubble. The four controls are Top, Bottom, Left and Right, all checked when this dialog first opens. Select the grids first to limit scope; otherwise the command can apply to visible grids in the active view.

Set the sides to display
In this example keep Top and Left checked and clear Bottom and Right. Top and Bottom apply to vertical grids; Left and Right apply to horizontal grids. Click Run. The setting is view specific, so repeat in a different plan when that drawing needs another bubble arrangement.

Inspect the grid ends
The captured plan has grid ends beyond the visible drawing area, so this image cannot prove that the bubble heads actually changed. Pan to the ends or adjust the extents to 2D and check the visible heads before delivering a sheet. The saved model retains the attempted setting.