boolean isOnScreen(Address address) {
		if (screenBottom == null || screenTop == null) {
			return true; // shouldn't happen
		}

		if (address.compareTo(screenTop) < 0) {
			// above the top of the screen
			return false;
		}

		if (address.compareTo(screenBottom) > 0) {
			// below the bottom of the screen
			return false;
		}
		return true;
	}
Those arrows that start at the current address
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/flowarrow/FlowArrowPlugin.java