I might've missed it but couldn't find anything on the forum about this.
Is there a way to create a new guide based on percentage? I often like to create either a simple crosshair (50%h, 50%v) or sometimes a rule of thirds grid (33.3%h, 66.6%h, 33.3%v, 66.6%v).
As far as I can tell the only way to create grids is to drag them from the ruler or use the Guides Manager which appears to only let me use pixel precision, rather than percentages.
Thanks!