# Multiline Edit Tools Dialog Box
[GstarCAD 2020](Help%20System/GSTARCAD/2020/Index.md) → [Commands](Help%20System/GSTARCAD/2020/Commands/(Commands).md) → [03 Dialog Boxes](Help%20System/GSTARCAD/2020/Commands/03%20Dialog%20Boxes/(Dialog%20Boxes).md)
The Multiline Edit Tools dialog box is used to modify multiline objects.
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## Dialog Box Description:
This dialog box displays four rows of examples to show multiline tools. The first row shows cross multilines; the second row shows Tee multilines; the third row shows corner joint and vertex in multilines; the forth row shows cut in multilines.
Relative Glossary:
**Closed Cross:**
Create a closed cross between two Mlines.
> **Select the first Mline:**
> Select the first Mline.
> **Select the second Mline:**
> Select the second Mline which intersect with the first selected Mline.
> **Select the first Mline:**
> Edit the Mline.
> **Undo:**
> Give up creating the closed cross.
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**Open Cross**
Create an open cross between two intersected Mlines. It will break all lines of the first Mline and the second Mline.
> **Select the first Mline:**
> Select the first Mline.
> **Select the second Mline:**
> Select the second Mline which intersect with the first selected Mline.
> **Select the first Mline:**
> Edit the Mline.
> **Undo:**
> Give up creating the open cross.
>
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**Merged Cross**
Create a merged cross between two intersected Mlines. The order of selection is not important.
> **Select the first Mline:**
> Select the first Mline.
> **Select the second Mline:**
> Select the second Mline which intersect with the first selected Mline.
> **Select the first Mline:**
> Edit the Mline.
> **Undo:**
> Give up creating the merged cross.
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**Closed Tee**
Create a closed Tee between two intersected Mlines. The first Mline will be trimed or extended to the intersection point of the second selected Mline.
> **Select the first Mline:**
> Select the first Mline.
> **Select the second Mline:**
> Select the second Mline which intersect with the first selected Mline.
> **Select the first Mline:**
> Edit the Mline.
> **Undo:**
> Give up creating the closed Tee.
>
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**Open Tee**
Create an open Tee between two intersected Mlines. The first Mline will be trimed or extended to the intersection point of the second selected Mline.
> **Select the first Mline:**
> Select the first Mline.
> **Select the second Mline:**
> Select the second Mline which intersect with the first selected Mline.
> **Select the first Mline:**
> Edit the Mline.
> **Undo:**
> Give up creating the open Tee.
>
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**Merged Tee**
Create a merged Tee between two intersected Mlines. The first Mline will be trimed or extended to the intersection point of the second selected Mline.
> **Select the first Mline:**
> Select the first Mline.
> **Select the second Mline:**
> Select the second Mline which intersect with the first selected Mline.
> **Select the first Mline:**
> Edit the Mline.
> **Undo:**
> Give up creating the merged Tee.
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**Corner Joint**
Create a corner joint between two intersected Mlines. Trim or extend Mlines to their intersection point.
> **Select the first Mline:**
> Select the first Mline.
> **Select the second Mline:**
> Select the second Mline which intersect with the first selected Mline.
> **Select the first Mline:**
> Edit the Mline.
> **Undo:**
> Give up creating the corner joint.
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**Add Vertex**
Add a vertex to a Mline.
> **Select Mline:**
> Select a Mline.
> **Select Mline:**
> Edit a Mline. It repeats prompting "Select Mline".
> **Undo:**
> Give up adding a vertex.
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**Delete Vertex**
Delete a vertex from selected Mline.
> **Select Mline:**
> Delete the nearest vertex of selected Mline.
> **Select Mline:**
> Edit a Mline. It repeats prompting "Select Mline".
> **Undo:**
> Give up deleting a vertex.
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**Cut Single**
Break the selected Mline and create a visible cut.
> **Select Mline:**
> Select one point on the Mline as the first cut point.
> **Get the second Point:**
> Specify the second cut point.
> **Select Mline:**
> Edit a Mline. It repeats prompting "Select Mline".
> **Undo:**
> Give up breaking the Mline.
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**Cut All**
Break the the whole Mline and create a visible cut.
> **Select Mline:**
> Select one point on the Mline as the first cut point.
> **Get the second Point:**
> Specify the second cut point.
> **Select Mline:**
> Edit a Mline. It repeats prompting "Select Mline".
> **Undo:**
> Give up breaking the Mline.
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**Weld All**
Weld the broken Mline.
> **Select Mline:**
> Select one point on the Mline as the first weld starting point.
> **Get the second Point:**
> Specify the second weld point.
> **Select Mline:**
> Edit a Mline. It repeats prompting "Select Mline".
> **Undo:**
> Give up welding the Mline.
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## Other versions with matching text
[GstarCAD 2016](../../../2016/Commands/03%20Dialog%20Boxes/Multiline%20Edit%20Tools%20Dialog%20Box.md) · [GstarCAD 2017](../../../2017/Commands/03%20Dialog%20Boxes/Multiline%20Edit%20Tools%20Dialog%20Box.md) · [GstarCAD 2018](Help%20System/GSTARCAD/2018/Commands/03%20Dialog%20Boxes/Multiline%20Edit%20Tools%20Dialog%20Box.md) · [GstarCAD 2019](Help%20System/GSTARCAD/2019/Commands/03%20Dialog%20Boxes/Multiline%20Edit%20Tools%20Dialog%20Box.md) · [GstarCAD 2021](Help%20System/GSTARCAD/2021/Commands/03%20Dialog%20Boxes/Multiline%20Edit%20Tools%20Dialog%20Box.md)