The layout helper allows you to add and resize columns. (This is similar to the add split option in Squared Up v2).
To add a column to a dashboard or perspective, click on the edit button (gear icon) to go into edit mode, then hover your mouse at the right-hand edge of the dashboard and the layout helper will appear.
When you hover over the layout helper it changes to a + plus. Click the + plus and a column will appear to the right-hand side.
To adjust column widths hover between the columns to make the layout helper appear, then when you hover over the layout helper it changes to a + and a two-way arrow. You can then click on the two way arrow and drag it left or right to resize the columns.
To delete a column hover above the column and the layout helper will change to a bin, which you can click to remove the column.
Squared Up will resize a diagram in the Visio tile to fill the column width. Resizing the column will make the diagram increase or decrease in size accordingly. You can also affect the size a Visio diagram is displayed in Squared Up by adding or removing the white space around the diagram in Visio as described below and in this article https://support.microsoft.com/en-us/kb/285024.
If you would like your Visio diagram to appear smaller within the column: In Visio increase the size of the white space (padding) or page around the diagram by holding down CTRL and dragging the corner of the page. Then save the SVG, and drag the new SVG file into the Squared Up Visio section again.
If you would like your Visio diagram to appear larger within the column: In Visio reduce the size of the white space around the diagram, save the SVG and drag the new SVG file into the Visio section again.