I started off in development in 1979 on an IBM System/34, that was around 7 years before IBM launched the PC (under DOS).

I was an operator before that, on an ICL 1901T and an ICL 1904S. Both of those machines had "knitted core", i.e. the main memory was comprised of ferrite rings with 3 wires ...

Thanks to both of you for your excellent advice.

By the way, as a software developer myself, albeit banking software on mainframes, I appreciate the tremendous effort that goes into development of something like Sweet Home 3D. To be able to get something of this sophistication and quality free is ...

Thank you. I'll work out how to do that. To be honest, I work on IBM mainframes and, most (all?) of the time, my MacBook copes with anything I throw at it. Size isn't something I usually have to worry about.

Once again, thank you for your help.

Thanks for responding.

The smallest I've been able to get it down to is 5.9MB. I printed a plan, from Home Design Studio, as a PDF which I opened in Photoshop and then saved as a .jpg.

As for pixels, it's 25200 × 17820.

I have tried to import a .jpg of my house floor plan. The latest attempt is still running, after 12 hours, and all that is displaying is the Background image wizard window with a little clock icon in the middle of it and the "Go back" and "Continue" buttons are greyed out.

I downloaded and ...