Comparing Versions
In the Light Table palette, click a version to compare the current outlines to the outlines from the selected version.
The Light Table tool will activate.
You can also activate the Light Table tool directly by clicking its icon in the toolbar or pressing the shortcut key D (as in “differences”).
Tip: When working in a team, it can be useful to show the profile picture of your collaborators in the palette next to each version.
For this, grant Light Table access in the settings (File → Light Table → Settings… → Profiles).
Changing the Comparison Appearance
With the Light Table tool active, both the current outlines and the outlines of the selected version are displayed.
You can modify the appearance of this comparison in the Light Table settings (File → Light Table → Settings… → Comparison)
Hold down the Shift (⇧) key to switch between the current version and the selected version.
The comparison outlines will be inverted, and the the Info box of the layer will show the values from the selected version.
Also, when holding down Shift and the Space bar, the filled-in outlines of the selected version will be displayed.
Aligning the Compared Outlines
Often, the sidebearings of layers will change between versions.
This can make it difficult to see the actual changes to the shapes of the layer outlines.
To ignore the sidebearing changes, align the outlines using the align left, align center, and align right options in the Info box.
Choose the no alignment option to not align outlines, which is the default behavior.
You can also pick a different default by Option-clicking one of the options or in the Light Table settings (File → Light Table → Settings… → Comparison).
Comparing Fonts with Font Proofer
If you have the Font Proofer app installed, then you can create a Font Proofer document comparing the current version with a previous version.
Right-click a version in the Light Table palette and choose Compare in Font Proofer…