You can set the line end and join styles for objects that have lineweight assigned,
either as an object property or as a plot style override.

1. Click Application menuPrintManage Plot Styles. Find
2. Right-click a CTB or STB file.
3. Select Open.
4. In the Plot Style Table Editor, Form View tab, click the Line End Style or Line Join
   Style field for the plot style you want to change.
5. Select an option from the drop-down list.

Learning AutoCad

sp Assign a Line End or Line Join Style. You can set the line end and join styles for objects that have lineweight assigned as a plot style override. In the Plot Style Table Editor, Form View tab, click the Line End Style or Line Join Style field for the plot style you want to change.Assign a Line End or Line Join Style. You can set the line end and join styles for objects that have lineweight assigned, either as an object property or as a plot style override. In the Plot Style Table Editor, Form View tab, click the Line End Style or Line Join Style field for the plot style you want to change.set the line end and join styles for objects that have lineweight assigned, either as an object property or as a plot style override. Click Format > Plot Style …Line End Style, and Line Join Style … or just regular AutoCAD Line Objects (width controlled by values set within CTB file) here?line end style to a squared/straight end rather … Is there a way to set the line end style for every line in every plot?To assign a line end or line join style. You change that property in your plotsyle. Here are the results of my F1 key (AutoCad help) search on …