Steps to reproduce: 1. Insert a table into the document with borders enabled 2. Zoom out so the zoom level is below 100% Expected behavior: The borders are always rendered at a minimum of 1px width, even if the calculated size is below 1 at the current zoom level (This is what Word does) Actual behavior: Some of the borders do not render.
Hi Rick, Such a problem can occur when the border thickness is less than 1px. The reason is that WPF can turn On or Off a single pixel. And this functionality depends on different factors, like the DPI of the screen, where the border is rendered in the pixel boundaries of the screen, etc. A possible workaround which you could use is to set the SnapsToDevicePixels to false - this will prevent the borders from disappearing but they could be blurry in particular scale levels. Regards, Tanya