Bleed

Bleed

Check the png size requirements of your printer. While most printers accept pngs that are a few pixels bigger or smaller, some are more finnicky than others. Note down the dimensions of the pngs they want from you.
Open the layout editor for your card and open the bleed and safearea menu (down the bottom). Calculate the ammount of bleed you need by entering the dimensions you got in step 1 into the the final desired height and width and then taking note of the bleed. For example, if you wanted Poker cards printed the Game Crafter, they need to be 1125 x 825px pngs. Put those desired dimensions in, and Dex will tell you need 3.179mm of bleed.



Add a caption...

You'll need to use this exact number for bleed in step 5 below, so note it down.The bottom line is, if you want pixel-perfect pngs for Standard Poker cards at 300dpi for different printers, you need to adjust the bleed ever so slightly. See the following table for some of the most common printers, and the bleed you'll need for each one:

Adjust for Bleed: In the layout editor, adjust/expand any card zone elements outwards to make sure they extend into the bleed area so your card will still look good if the printing is a bit off (see the bleed tutorial video if you need help with this!).
Safe area: Check you don't have important icons near the edge of your card. Move them inwards so you won't miss important icons if the printing cut is a bit off. (Personally, I wouldn't worry about anything inside a 2mm safe area, but it is technically a risk you take).
Export your cards as pngs with bleed: When you go to export (for either pdf or png) turn ON the bleed on the dextrous export page. This should be whatever number you noted down in step 2 above. Note: If I'm just printing cards at home, I'll set bleed to 0 so that I can cut out my cards with a single cut (since their edges touch), but because I've optimised the layout for bleed, it's now ready for printing with bleed as well. Best of both worlds.