Sweet Home 3D Help > Editing preferences, plan and 3D view

|  |  | Editing polylines and curves

You may edit the location of polylines with the mouse, after selecting them in the plan. To select one polyline in the plan, click on it. To select multiple polylines or multiple objects in the plan, draw a selection rectangle around them, or/and click on them while pressing shift key. To move the selected objects, place the mouse pointer inside the selected box of one these objects then drag and drop them, or press the keyboard arrows. When one polyline is selected in the plan, you may move any of its points, with the point indicators that appear at each point of the selected polyline. When the mouse pointer is upon one of these indicators, it changes to indicate you can drag and drop that point to move it. The color and the style of a polyline may also be edited thanks to its pane, that will appear after a double-click on it, or by choosing Plan > Modify polylines... after selecting it. In the polylines pane, you may change the thickness of the selected polyline, the arrows drawn at its ends, the style of joined lines, its dash style, the offset to shift dash pattern at start and its color. The last choice of the Join style drop down list allows to draw a curve instead of lines.

• | If you want to modify the style of a set of polylines, select these polylines and choose Plan > Modify polylines.... The values of the attributes that are different from one polyline to another in the selected polylines set, will appear blank in the polylines pane. You may also copy the style of a polyline on other polylines, by copying it in the clipboard with Edit > Copy menu item, then choosing Edit > Paste style after selecting the polylines you want to modify.
• | If you want to disable the activated magnetism for the angles of the lines you draw, disable the magnetism in the preferences pane or while moving points, hold down the Alt key under Windows, the cmd key under macOS or the Shift + Alt keys under Linux.
• | If the objects selected in the plan contain walls, rooms, furniture, dimensions, polylines and texts, all these objects will be moved with a drag and drop or the keyboard arrows. If you keep the Ctrl key (or under macOS, the alt / option key) pressed while you drag and drop these objects, they will be duplicated.