To increase or decrease the size of markers on a JMP graph, follow these steps:
1. Right-click anywhere in a graph. Press Ctrl and right-click to broadcast the command and apply it to all plots of the same type located in the same window. In a histogram, right-click the box plot area on the right.
2. Select Marker Size.
3. Select one of the marker sizes listed.
The default value, Preferred Size, is selected on the Graphs page in the JMP preferences.
Note: When the drawing speed is set to Fast, the smallest marker size (Dot) is applied. See Work with Crowded Markers.