Questions about EasyEDA part selection

[Peabody]

I drew my first schematic on EasyEDA yesterday.  It will eventually be included in a Github repo as a guide to breadboarding the circuit, but not for designing and ordering a PCB.  I found that the only part that I used that's in an EasyEDA library was the Arduino Nano.  The 7-Segment displays, rotary encoder, buzzer and SSR I used in the circuit were not found, although equivalents were there, and I used those.  But I have all these wrong part numbers on the schematic, and EasyEDA won't let me change them.  I understand why they do that (the footprint), but just want to understand what I would have to do to make it look right.  Is there any secret way to get it to use a generic icon, or do I have to create virtually every part I use, complete with footprint?

One way of dealing with this is to export the schematic and bring it into Paint.  But I don't see a way to get  high-res image out of EasyEDA.  The PNG option yields 1100x851.  Is there a way of improving on that?  Is there software that converts an SVG file into a BMP image?

If EasyEDA isn't a good choice for schematics like this, what would be?  In this case, all of the parts are available at Digikey.  If they have a schematic drawing program, maybe at least I could get the right parts on the schematic without having to create them.  Are there any other options for generic-parts schematics that would let me type in the part numbers?

Obviously I'm new to this.  Any guidance would be appreciated.