I suppose it depends on whether it was drawn by a wireman or by the designer. Small firms often benefit from more direct contact between the designer and the user or repairer.
The drawing office in one firm I worked for was mainly staffed by radio amateurs and/or radio engineers. Their circuit diagrams and handbooks were a model of clarity.
Many circuit diagrams I encountered were clearly not drawn by the designer. Another issue with circuit diagrams from times gone by would be a line which went nowhere because it joined to a line on another page which may or may not be easy to find.
I try to draw my circuits as one big drawing, but if I can't, I try to make the lines from one section to another appear in the same order down the page with clear lettering or numbering (and possibly a bracket around them with a legend to say where they go). I'm usually the person who will have to make sense of them years later, so I feel I should leave clear instructions to myself so I can see what I was doing.
That's fine if you can do it. Most people aren't good at tidying up afterwards which is why software is full of memory leaks. It's not possible to do much about human nature. My collection of
Usually the long side is positive.
Reverse betas are usually in the single digits.
I have seen both conventions, so neither is 'usual'. To avoid confusion I normally put + and - signs against the battery terminals in my diagrams - but I didn't in this case because I thought it would detract from the point I was trying to make about the layout. Similarly I didn't include component numbers or values.
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