cad appeared this perpendicular parallel symbol, how to remove ah

1, first of all, open cad software in the computer, in the operation of the main page, draw parallel lines, as shown in the following figure.

2, and then click on the operation of the page above the labeling of geometric constraints, as shown in the figure below.

3, and then select the constraints, click "delete constraints", you can complete the operation, as shown below.

4, and finally draw the graphics, the constraints of the vertical parallel symbols will not appear, as shown in the figure below is complete.