Function Description

Auto-split Lines function is used to split the original object and the new object at the intersection when drawing a line, and create multiple line objects.

• The auto-split lines object is applicable to line layers or CAD layers.
• The operation process of auto-split lines is shown in the figure below.

  Draw a line object intersecting with Figure 1, and compare the results with and without enabling the auto-split lines object, as shown in Figure 2 and Figure 3.

  Fig.1 Draw Line Feature	Fig.2 Non-Auto-Split	Fig.3 Auto-Split Result

  The original line object (Line 1 in Figure 1) is deleted after being split, and the new line objects generated from it (Line 3 and Line 4 in Figure 3) are assigned by the system for their system fields (except SmUserID), while their non-system fields and the field SmUserID retain the corresponding attributes of the original line object. The attributes of the newly drawn line objects (5 and 6 in Figure 3) are added to their attribute table in the order of drawing.

• If the drawn line object intersects with a complex line object (the original object), i.e., a line object with multiple sub-objects, when the auto-split lines object is enabled, the newly drawn line object will be split at the intersection, and the original object remains a complex object but generates new sub-objects at the intersection. You can select the object, right-click, and view it in the properties dialog.
• If the newly drawn object does not intersect with any line object, even with the auto-split lines object enabled, it will not be auto-split, and only the drawn object will be retained.

Function Access

• Edit Data Tab -> Edit the Settings Group -> Drawing Settings Dropdown Menu -> Auto-split Lines.

Operation Instructions

1. In the Edit Data tab, in the Edit the Settings group, click the Drawing Settings dropdown button and select the Auto-split Lines option from the dropdown menu; or use the Shift+K shortcut to enable the auto-split lines object function. To cancel the auto-split lines object function, click this option again.
2. In the current editable layer, draw a line object. After drawing, the newly drawn object and the original object will be automatically split into multiple objects at the intersection.