Line jumps is an advance schematic feature which gives a visual cue at the intersection of where two lines meet. There are 3 types of line jumps as illustrated in the above image: Arc, Gap, and Sharp; the default is none.
To enable Line jumps select your Flow line(s) or select all Flow lines by right-clicking on the schematic and selecting Select Flow Lines from the menu. Navigate to the Style panel in the Format Panel and select the Line jump type from the dropdown. You can increase the jump spacing by increasing the numeric value next to the jump dropdown.
Note: Line jumps only appear on the frontmost Flow line. If you added a Line jump and it's not showing on the intersecting lines either change the spatial positioning (to Front or to Back) of that line or it's intersecting line or apply the Line jump to the other intersecting line.