"The next step is to convert the lines that make up the template
into Inkscape guides. The template object that was imported from
the PDF may be in a group. To convert the template to guides, we
first need to ungroup the lines that make up the template. Go to
Edit > Select All to select all the objects, then choose Object
> Ungroup twice. The document should look similar to this:
"Now, keep the lines selected, and choose Object > Objects To
Guides from the menu. The original black lines have now been
replaced with blue guide lines:
"1.3.1. Configuring Snapping for Inkscape 0.46
"Open up the Document Properties dialog by going to File >
Document Properties... in the menu. Select the Snap tab and
configure the preferences as per the screenshot below:"