So I built a small tool that merges Allen CCFv3 with the traditional bregma-relative coordinate system (calibrated with Paxinos & Franklin's Atlas). Click any coronal or sagittal section, and get coordinates instantly.
bohanzhao.com/Atlas
Hope it saves someone a headache 🐭
Free interactive tool: enter bregma-relative AP/ML/DV coordinates to navigate Allen Mouse Brain Atlas coronal and sagittal sections. Brain regions identified in real time.