Clamping on a view
Normally, if you are zoomed in on a small region, it is very easy to scroll away from the target region and lose it. Clamp to view so you don't lose what you're examining as you browse the region using the zoom and scroll sliders.
Clamping restricts the max and min coordinates of the view to the boundaries of the clamped view, so that you cannot zoom out or scroll beyond the range you've clamped to.
For example, if you want to examine the gene GABPA more closely, zoom in so the gene is the width of the window, then clamp to view. When you then zoom in further for a closer look, the scrollbar now will not scroll beyond the begin- and end-points of the gene.
Clamping also allows finer control when scrolling with the horizontal slider. To clamp to a view:
- Zoom in on a region of interest. If you're zoomed all the way in or out, you can't clamp.
- Choose View menu > Clamp to View
- To unclamp and zoom out to or scroll along the entire chromosome or file content, choose View menu > Unclamp.
You will automatically become unclamped if you switch the view to a different chromosome.