It’s possible to create a layer that has Start / End delays per cut, but it’s not possible to set a delay for an entire layer.
Something that’s relatively easy, if you have a spare layer: Draw a line using a spare layer, set it to 1% power, and 1mm/sec speed. Draw the line however long you want the delay to be (10mm at 1mm/sec is 10 seconds). 1% power isn’t going to fire the tube, and your machine has a pause button, so the delay really only has to be long enough to give you time to hit the pause button, then un-pause when you’ve made the adjustment.