Transferring seamlines from pattern to fabric on all garment pieces is helpful for sewing beginners as it provides a stitching guideline in the garment construction process. Seamlines that are marked directly on the garment pieces will also facilitate the seam alignment process, especially for beginners that are new to the process.
An easy and conventional way to transfer seamlines to your cut fabric pieces is to use a ruler or gage pointer and tailors chalk or fabric pencil to simply draw the lines along each edge. Keep in mind that the semalines are located at the exact seam allowance width from each cut edge.
To make sure you draw your seamlines accurately, it is important consult your sewing patterns for exact placement. Determine the seam allowance width along each edge and adjust the gage pointer to record.
Using the gage pointer set at the correct seam allowance width, measure form the fabric's cut edge inward and mark using a fabric pencil or tailor's chalk- in this case, a fabric/quilting pencil is used. Continue moving along the fabric edge marking the seamline placement with dash lines.
If you do not have a gage pointer, it is perfectly acceptable to use a ruler as your measuring tool. Simply note the seam allowance width and measure it from the fabric's edge in, marking dash lines as shown. In this example, the seam allowance is 1/2". It helps to use a clear plastic ruler marked with lines down to the 1/16"- the rulers transparency and the grid lines provide an accurate and fast way to measure inward as shown.
When transferring the seamline along a curved edge (such as the neckline or armholes), apply the dash marks closer together at a higher density. Doing so will provide a smoother line to follow in the stitching process, especially since stitching along curved edges evenly can be a bot tricky. Applying the dash lines closer together will also feel more comfortable as you are marking along abrupt curved edges. Given that more precision and comfort is required in this instance, it helps to choose a quilting or fabric pencil over tailor's chalk.
Tailor's chalk is bulkier and thus leaves a thicker line when marked. It marks best on thick, textured and crisp fabrics, especially wool and acrylics. Due to their thickness and consistency , tailor's chalk lines can be overwhelming and uncomfortable to mark when working with light, flimsy fabrics. A fabric pencil has a sharper point that allows for more precision and naturally, a thinner line. You should choose a fabric pencil over tailor's chalk when working with lighter-weight fabrics or when marking along irregular curved edges as it will not only provide added control and comfort, it will also form a more distinct line.