Click on Fused cloud settings or click 'Alt+f' and select “Show Fused Cloud”.
Once the Fused cloud is selected, the accumulated points in the lidar will be shown in the current frame.
The points will be shown only for the frames which are preloaded.
Fused Tile Size:
Click on Fused cloud settings and change X and Y values under Fused Tile Size for increasing or decreasing tile size or click on Edit Fused Tile and increase the size of the tile in any direction.