This method of dimensioning is also called chain dimensioning as dimensions are added like chain links, one after the other. The Continue dimension tool is on the Dimension panel of the Annotate tab, as shown in the following screenshot:

Before you use the Continue dimension tool, you need to make a reference dimension, which is explained in the following steps:

1. Click on the Linear dimension tool from the Annotation panel of the Home tab or the Dimensions panel of the Annotate tab, or use its command alias, DLI.
2. Now click on point A, then on point B to make the first horizontal dimension.
3. Now select the Continue dimension tool and you will notice that the dimension will automatically start from point B, and all you now need to do is specify the next point for the dimension.
4. Click on point D, then on point F and you will end up with a continue dimension up to point F. 

When you are done adding the continue dimension, press the Esc key to exit the command and the dimensions will look like the following figure.

As you may have noticed, this method of dimensioning removes the hassle of selecting start and end points in situations where you want to make multiple dimensions in the chain form. The next dimension type, Baseline, is also similar, but instead of a chain, this dimension type adds a dimension using a reference point called a baseline. We will discuss it in the next section.