Then Click on the Line Tool, set the Line weight that you want. For example
20 pixels wide. Click where you want the Line to start and hold the shift
key to constrain the line to a straight horizontal.Pull the line to where
you want it to stop. When you do this it places a shape layer into the image
layer structure and calls it Shape 1. For example I used a 10x8 file to test
this out. I started my line at 1" and ended it at 9".
Now comes the fun part, decide where you want the fade to start on both
sides.Click on the Rectangular marquee tool and draw a rectangular
selection to those points. I used 2" to start and 8" to end the marquee.
which gave me 1" on both ends of the line outside of the rectangular marquee
selection. Click on Select >Feather and enter a value into the Feather
larger values give a more gradual fade, so this will take some tweeking and
adjusting of values to get the fade the way you want it. Once you have
applied the Feather. Click on the Add Layer Mask icon at the bottom of the
Layer Palette.You will see a fade on the ends of the line if this is not
enough fade Click on the History Palette and stepback past Feather then
select Feather again with a different value.Then Click the Add Layer Mask
icon again.You can continue to adjust the fade by using the step back in
History to reset the fade value. If there is a sharp distinct line
surrounding the faded line this is the Shape path so go to the Paths Palette
and click on the empty space below the path to shut off the path. You should
see a line that fades at both ends now without the path around it.You should
see three distinct components on the Shape 1 layer the Layer Thumbnail,the
Layer Mask thumbnail and the Vector Mask thumbnail.
With the Shape 1 layer highlighted (selected) Click on Layer>Rasterize
either Shape or Layer. Once you get the layer rasterized you can do an
Edit>Transform>Scale and make the line thicker or change the end points etc.
Plus you can also use Distort or Perspective to get some neat effects. Once
you get the line the way you want Click Enter to set the transform. By
feathering the selection you are applying a feathered mask to both ends of
the line at the same time when you click the Layer Mask icon. I hope this
Adobe Certified Expert
Using the rectangular marquee tool, drag out a long thin rectangle outlining the desired line length and width.
Using a brush diameter greater than the line width, fill in the central portion at 100% brush opacity.
Fill in the remainder of the line with brush strokes from the 100% opaque segment to the ends after bringing up the brushes palette and activating opacity fade (under "Other Dynamics") and choosing the number of brush diameters over which you want the line's opacity to fade to zero.