A few questions

[Rene_Poschl]

@Hextejas

2. Re the design rules. do I need to remember them for each PCB manufacturer, and enter them accordingly ?

Even different options of the same manufacturer might need different settings.

@Hextejas

3. When drawing edges, and I guess the traces as well, I click to start, then, if I have to make a turn or am at a corner, click once again ? It seemed that if I just changed direction, the line would go diagonally.

This depends on the canvas you use.

I can only talk about opengl canvas as i never used legacy:

For graphical polygons (edge cut) you can use the crtl key to activate the k*45° mode.
With the interactive router, you can lay down long traces semi automatically. (left click does fix what you have laid down until now.)

@Hextejas

Lots of times when I am drawing a connection, the O from a resistor, capacitor, etc., where the connection is to terminate or begin turns into a small square rather than disappear. I have been deleting the connection and redrawing it until I got it right. Is that proper or could I have left it as is ? What can I do to prevent this ?

I assume you are talking about the schematic here. If there is a sqare at the end of a wire, then you have not made a connection. Wires in eeschema only snap to the grid so make sure you use a grid that can connect your symbol pins. For the official lib you should use 50mil grid.

@Hextejas

I don’t recall exactly what I was doing but it had to do with drawing a box around the complete board and filling it all in. Sometimes when drawing the box, and this box is on top of the edge box, the lines do not exactly correspond to the edge. They might be a small bit inside or not quite parallel to the edge. I have been erasing them and redrawing but is that necessary ?

Are you talking about filled zones here?
I think they fill with a small offset to the edge cut and should therefore be parallel to it. But if the zone outline is too far away then it will just fill to the outline it self.