If the linetype that you want to use is displayed in the drop-down list, click the linetype to make it current.
If the linetype that you want to use is not displayed in the drop down list, click Other. Then, in the Linetype Manager dialog box, click Load and do one of the following:
Choose a linetype and click Current to draw all new objects with that linetype.
Choose BYLAYER to draw new objects in the linetype assigned to the current layer.
Choose BYBLOCK to draw new objects in the Continuous linetype until they are grouped into a block. When the block is inserted into a drawing, the objects in the block display the current linetype.
Note: You can hold down Ctrl to load several linetypes or hold down Shift to load a range of linetypes.