diff --git a/docs/CAPTURE.md b/docs/CAPTURE.md
index 85823cf..9b6dcdd 100644
--- a/docs/CAPTURE.md
+++ b/docs/CAPTURE.md
@@ -9,6 +9,7 @@ Photograph the slab on a green or black sheet.
 - Sheet fills the frame around the slab.
 - Slab is fully on the sheet.
 - First photo is top-down, lens parallel to the face.
+- Length of the slab is aligned with the long side of the picture.
 
 The app expects that sheet. Background removal keys green or black. Other backgrounds are out of this increment.
 
@@ -23,6 +24,17 @@ The app expects that sheet. Background removal keys green or black. Other backgr
 7. App computes widths, sqft, and bdft from the mask, and writes the inventory PNG.
 8. User sees the PNG and the numbers.
 
+## Draft
+
+One in-progress slab is stored on the device.
+
+On open or refresh, if that draft exists, the user chooses Continue or Start fresh.
+
+- Continue restores the slab at the last approved step.
+- Start fresh discards the draft and returns to Setup.
+
+After a successful Woo create, the device draft is cleared.
+
 ## Measurements
 
 - Widths: min, max, avg, sampled every 6 in along the approved length axis, perpendicular to it