Your filaments are listed in the main view: untick the ones you do not have, and pick the BACKING filament (the backing, the border and a test slab's peel tab print in it; usually your darkest, most opaque one). Already have a setup file? ⋯ menu > Import a setup file.
The demo filaments were measured on real prints of those products; your spools (another batch, another maker) can differ. Measure your own with a coupon to replace them.
Add a filament
What is on the spool's label: the maker, the product line and the color name, and the barcode if it has one, so you (and a coupon reading) can tell two spools apart.
Numbers you already have (advanced)
How much ONE layer of it hides what is under it, in red, green and blue: 0 = clear, 1 = hides it completely. Only if you have these numbers already (an earlier reading, another setup); otherwise leave them empty and measure the filament with a coupon (Measure your filaments, below).
The layer height here must match the layer height you print at (Slicer settings). A print at any other layer height will not use these numbers: one layer of a different height hides a different amount.
A filament with only a name and a color is listed, but no print can use it until it is measured with a coupon (Measure your filaments, below), which finds how much 1 to 8 layers of it hide in each of red, green and blue.
Measure your filaments (advanced)
Calibration
Make a calibration coupon
A small print that measures your filaments: each one at 1 to 8 layers over a dark and a light base, the bases included. Black and white bases work best (the most contrast); any dark and light pair works.
Read a coupon
A scan of the coupon's face, flat on the glass, on a light background. The results show beside the filament list.