This page explains the diagramming conventions used in my weaving gallery. I have adopted the conventions of Guntram’s Tablet-weaving Thingy (GTT), a Windows-based application for designing tablet-woven bands. 
First, let’s get oriented. Since terms like “left”, “right”, “up”, “down”, “forward”, “backward” are relative, you need to know what they’re relative to. These conventions are relative to the weaver who is behind and facing the woven part of the band, the tablets being farther forward, as shown in this picture.
Tablet threading diagram
Tablet holes are labeled A, B, C, and D, in clockwise order as viewed from the weaver’s right (the face showing in the picture above). Tablets are numbered from left to right. In a threading diagram, rows are labeled with holes A through D, columns with card numbers, and a cell shows what color warp thread is to thread the hole. In the example below card 11 is threaded as A:blue, B:black, C:yellow, D:yellow.
Threading direction
The last row shows threading direction using Collingwood’s S/Z convention. For example cards 8 and 26 are S- and Z-threaded respectively as shown below:
Weaving (turning) diagrams
Bands woven from threaded-in patterns are not accompanied by turning diagrams; you weave them with 4 quarter turns forward, 4 backwards, repeat.
For woven-in patterns in which cards are turned independently, diagrams are read bottom-up. The turning direction for a card is inconsistently shown as either a slash (“/” = forward, “\” = backward) or a colored cell (white = forward, black = backward). Reminder: “Forward” means turning away from the weaver, as a bicycle wheel turns.