enhance document to provide concret example for specifying the page and coordinates of the signature field

[LeiYangGH]

In the CLI documents, https://pyhanko.readthedocs.io/en/latest/cli-guide/signing.html#creating-signature-fields There's such command line example --field PAGE/X1,Y1,X2,Y2/NAME but it is difficult to understand what real numbers should be even read the following paragraph. for example, i know PAGE should be replaced with page number, X1,Y1,X2,Y2 stands for some coordinates. but what does the NAME mean and what should it be replaced with? it would be great if provide concret example, thanks!

[MatthiasValvekens]

Fair enough, that could be made more clear.

• PAGE is the page number
• X1,Y1,X2,Y2 are the coordinates of two opposing corners of the signature bbox (traditionally, lower left and upper right)
• NAME is the name of the signature field to create.

I'll add this to the docs.

[LeiYangGH]

thanks for the quick action!