Adding a layer forces you to re-save older presets, since they have no data for the new layer

A new VPT layer is always added on top of existing layers, so it initially obscures them until positioned and made transparent. The subtler consequence is that any presets saved before the layer existed have no information about it: on recall VPT initialises the unknown layer to its default (opaque, centred), breaking the look of those older presets. The fix is to visit each existing preset, set the new layer’s transparency to 0, and re-save it. The principle generalises — any project-wide structural change (adding layers) requires a pass back through every stored preset to keep them correct.

Examples

You have presets 1–5 saved, then add layer 3 for a new effect. Before continuing, recall each of presets 1–5, set layer 3’s transparency to 0, and re-store each one.

Assessment

You add a fourth layer to a project that already has 10 saved presets. Describe every step needed so those older presets still look right when recalled, and explain why the step is necessary.