Nancy, I like any art/craft catalog better in paper format, too. You can easily mark a page or flip back and forth.
Even so, I've fallen in love with a window treatment/decorator pattern catalog online over the last couple days. If anyone hasn't seen a catalog from a window-treatment pattern company lately, I highly recommend this one. Wow. You just click on the page and it will get larger to read. Warning - there are 50 pages and every one is such pretty line drawings of ways you can make a valance, or pillow, or shade, from simple to fancy. You can spend a LOT of time looking, so watch out. LOL.
Their patterns are expensive, but I don't think you'd need to have every one you were interested in after you learned. And frankly, some come up on ebay, saving about a third after shipping. They are probably a good value, since they are not tissue paper but kraft paper to take harder use by pros who are going to make a lot of window treatments, and I must admit it is so interesting to see such an array of decorator looks made up into patterns for someone to make themselves. The catalog is large. There's a lot you can learn from it, a lot of ideas you could figure out yourself. One I'm interested in looks like I could do it myself, one looks like I'd have to buy the pattern.
So I'm also looking at online tutorials on making valance boards and how people do that inexpensively or easily. I've never made any type of curtain or valance except for those that thread onto rods, and I've found out I've been missing a lot. I've learned the word "board" means different things to different people.
To someone who wants a valance that is smooth and neat at the top, but the fabric hangs down free, "board" means a piece of wood like a 1x6 or 1x3, etc. It rests on the top of a window frame or on top of higher-set nails, jutting out. Velcro is attached to the 3 edges of it that will be visible, and the other part of the velcro is attached to the cloth valance project (top, wrong side), and you put it up and tada, take it down to wash.
To someone who wants what I call a cornice, also called a pelmet (like an upholstered, rigid valance), "board" means a shape like a box lid with one long edge gone where curtains might hang. That long edge might have a pretty curve. It could be made of wood or foam board. You cover that with batting and fabric, maybe trim, and hang it.