A little something to share: How to get your seam done quickly.
First, we have to make a grid cardboard to guide us. You can use this over and over again, so you only have to do this once.
Paste a graph paper onto a thin cardboard, use spray adhesive for best result.
1 small increment of my graph paper is 2mm, so 1 big square is 2 cm. If required, you may draw lines with colour pens for indication of your commonly use seam allowances.
Now with the grid cardboard as guide, you do not have to draw lines for seam allowance, and it makes thing a lot easier