On each page you’ll find many posts on each topic, starting from the very basics to more advanced topics. If you hover near one of the text boxes, some dots will appear on the border, like the one here on the left. While you’ll be giving up slide real estate to include note lines, this is a … If you are using Google Slides, you may be having some trouble finding how to insert a line. With the picture selected, click on the drop down by the Crop Tool. Subject: Re: How do I get rid of a square dashed line in a wierd place on the page. This tutorial assumes that you already have a picture on a slide, and that you want to add a border to that picture. Some Google Charts, such as the Area, Line, and Combo Charts, have lines connecting data points. Select the tool to choose your line weight.