BY LENGTH

Purpose:

To enable a user to lengthen or shorten either a straight line or an arc, currently in a 2-D drawing

Instructions:

1. In the Modify menu, click Trim, then By Length.

   Cursor select the straight line or arc, locating the cursor at the end of the line or arc that is to be modified. The system responds with presenting the user from a multiple choice from which to select.

2. For straight lines

   The options of new length and delta length can be selected. If 'new length is selected' then the line is made equal to the value that is input by the user, determined from the line end point that was the nearest to the cursor when the line was selected. The system will not accept negative numbers in this function.

   If 'delta length' is selected then this value is added to the end of the line that is the furthest away from the end point that is the closest to the cursor when the line was selected. The system will accept both positive and negative numbers, thus enabling the user to stretch/shorten the line relative to this point.

3. For arcs

   The options of new length and delta length still apply and have the same result as for the straight line condition, again using the arc end point that was the closest to the cursor when the arc was selected.

   The option central angle can be selected. The user can input the required new included angle and the system will modify the arc accordingly, with the angle being determined from the end point that was the closest to the cursor when the arc was selected. The system will not accept negative angles.

Options:

None.

Result:

Straight lines and arcs will be modified, displayed on the screen and stored in the drawing file.