newbie: How to keep dimensions in sketch when drawing is printed?

This is my first day using solidworks, and for the last hr I have no been able to figure how this simple problem.

I make a drawing, add dimensions to it. On the screen I see the dimensions there, but when I do print preview,

or save the drawing as JPG, then only the lines show up. No dimensions.

This is what I do: Create new PART. Select TOP PLANE.

Then Ckick on skitch. Draw 2 lines connected. Then click on smart

dimensioning, and add an angle dimension between the 2 lines.

All works well. I see on the screen the angle value there and the arrows fine.

I save the drawing. Now I do print preview, or save as to JPG, but the dimensions do not show up.

They only show up on the screen when I am in sketch.  How to keep the dimensions in there?

Also, is there way to save as PNG? I only see save as JPG for images.

One final small question: How do I get rid of the green markers that show up each time when

I add a dimension (right next to the values). They are little square shaped green markers that

just stay there, I do not want them since they make it hard to see the values of the dimensions.

Any recommendations for a very simple tutorial or a book for someone who never used this software before?

All the tutorials I saw are too advanced.

thank you

SolidworksDrawings And Detailing