How do you want to split them?
Starting situation (both columns selected from column list and dropped at the same time to Y-axis):
![jthi_0-1689951994940.png jthi_0-1689951994940.png](https://community.jmp.com/t5/image/serverpage/image-id/55147iCD98167785EDAC3A/image-size/medium?v=v2&px=400)
Option 1 (both columns selected, drop them to Y-axis while holding shift. You can get the same graph if you drop first one and then try where you should drop the second to split Y-axis like this)
![jthi_1-1689952024298.png jthi_1-1689952024298.png](https://community.jmp.com/t5/image/serverpage/image-id/55148iADCD829A88382F43/image-size/medium?v=v2&px=400)
Option2 (stack your data first from Tables/Stack. Drop data to Y-axis and labeling to Y-grouping on right side):
![jthi_2-1689952073117.png jthi_2-1689952073117.png](https://community.jmp.com/t5/image/serverpage/image-id/55149iE9A15D8AD903A7C3/image-size/medium?v=v2&px=400)
Option3 (still using stacked data. Instead of dropping label to Y-group, drop it to Page)
![jthi_3-1689952127349.png jthi_3-1689952127349.png](https://community.jmp.com/t5/image/serverpage/image-id/55150i299BE5B9E3894DA7/image-size/medium?v=v2&px=400)
-Jarmo