Charts lines with differences: sqaures, circles, triangles

Thanks,
I have another question:
How can I add at the legend: Blue line is ...
Red line is ...

And So on: square is ...
traingle is ...
(How to make the shapes square, triangle appear at the legend)?

Yes the legend displays the whole name.
How can I add in addition what represent blue or red. and what represents square, traingle, circle and so on.

I'll give an example:
Let's assume that blue is project 11 and red is project 12.
and suppose square is category 1000 and triangle is category 1015, and circle is category 1016.

The legend gives information on each plot, in the example above:
For blue with squares: the legend shows Project 11, Category 1000
For blue with triangles: Project 11, Category 1015.
For red with triangles: Project 12, Category 1015.
For red with circles: Project 12, Category 1016. and so on for each plot.

How Can I add to this legend: blue - project 11, red - project 12.
line with squares: Category 1000, line with triangles - Category 1015 ...

Thanks for all the help.

The legend shows the description of each plot individually.
I am looking, in addition to that, to add each a description for a subgroup of plots.
e.g 4 plots with color blue, add the description of what the color blue means.
4 plots with color red, add the description of what the color red means.

Thank you all!