Polyline / Line Annotation ​

You can draw straight lines or polylines on the image through the polyline tool.

Usage ​

Click the polyline tool to enter polyline drawing mode.

• Draw a straight line: Hold down the left mouse button and drag to draw a straight line. Release the left mouse button to complete the drawing.
• Draw a polyline: Click the left mouse button to draw the first point, click the left mouse button again to draw the second point, and so on. Finally, double-click the left mouse button or click the right mouse button to complete the drawing.

Adjust Polyline / Line ​

When the polyline is in the adjustment state, there will be control points. You can adjust the position of the polyline by dragging the control points. You can also adjust the position of the polyline by dragging the middle part of the polyline, or use the mouse wheel to adjust the thickness of the polyline. Click the color on the palette to switch the color of the polyline.

Fixed Angle Polyline / Line ​

Hold down the Shift key while drawing or adjusting the line/polyline to draw lines/polylines at fixed 45° intervals.