Layer content across multiple layers can be spaced evenly on the page using Alignment commands.
Spacing ensures there is an equal distance between the edges of layer content.
Instead of spacing being calculated between selection bounds, you can control spacing in relation to any targeted key object in the current selection. This targeting is done using the modifier. By keeping this modifier active after targeting, you can set the overall spacing based on the spacing between the key object and the rightmost item in the selection. Without the modifier applied, the spacing is based on the spacing used between the key object and the leftmost item.