This document summarizes the changes between v1.5 and v1.6.

• MARKETING_VERSION: 1.5.2 -> 1.6
• CURRENT_PROJECT_VERSION: 458 -> 462

The Manage Bookmarks sheet now supports additional sort modes:

• Newest
• Name
• Palette (new)
• Iterations (new)
• Scale (new)

Bookmark rows now display context-specific secondary text in the list:

• When sorting by Palette: shows the bookmark palette label
• When sorting by Iterations: shows the saved iteration count
• When sorting by Scale: shows the saved scale in scientific form

• Help content now documents bookmark sorting options and behavior.
• The "What’s New" onboarding content now highlights improved bookmark management.

• Deep CPU mode activation threshold was raised:
  • cpuDeepZoomThresholdSPU: 5.0e7 -> 8.0e7
• CPU-mode hysteresis was tightened:
  • enter: 1.0 -> 1.10
  • exit: 0.7 -> 0.98

Net effect: the renderer stays on the GPU path longer before switching to CPU deep rendering.

• The bulk of v1.6 focuses on the bookmark management UX and documentation.
• No major fractal algorithm rewrite was introduced in the v1.5 -> v1.6a commit range.