Hey there.
Not long ago, I used to go frequently on the following website to use a feature allowing people to create Boundless glyphs, cross-reference some with known glyphs or create new ones :
http://boundlesscrafting.com/lore/glyph
It helped me A LOT and was a huge time saver to figure out my build.
I think the website belongs to @Stretchious but I might be wrong.
Probably not what you might consider ideal, but a temporary in-game substitute: make an arrangement of 3x3 blocks of any type, turn them all into the new lattice-type blocks and then use a precise square chisel to work out what glyph shape you’re making.
The spacing will likely feel different, but should still allow you to plan glyphs. I don’t know any other website that provided that feature, unfortunately.
Mentioning glyphs, i am surprised we still dont have them in-game in some menu that explains the glyphs and the lore behind them or even in block form so we can use them to write stuff.
I have it on my long list of todos to add back on to the website, along with the fonts I created.
I was obviously under the false impression that no one used them, which it why it wasn’t a priority to put back in.
Well, that page was one of the main things which inspired me to start building my Sanctuary, back before I moved to Raxxa, when I was planning on building on Arie (yeah, it could’ve been the Arian Sanctuary or something like that XD).
I’m sorry I never thought about saying it before, but thank you. 
No worries, I really need to allocate some time to it this weekend so will see what I can do to get it back on there again
When said out loud, that’s a very unfortunate name.
I know, right?
Good thing I moved to Raxxa, TBH. ^^
I mean, the first name I had when I was on Arie was the Alabaster Terrace, which isn’t bad… just a different road.
