Acrobat DC - Dashed or dotted line option unavailable in line properties : Grayed out

Hello,

I have upgraded to Acrobat DC Standard. When I choose to draw a line and then click on the line to have access to the properties menu, in the ''Style'' box where you can usually choose the type of line you want to choose to draw like a dotted or dashed line, these options are unavailable. They are Grayed out. Same goes for ''Connected Line''.

How can I reactivate these choices like a had previously in Acrobat Standard IX in this same properties menu?

Thanks for your help.