Changing Construction Line to Dotted Line

Can someone please tell me how to change a construction line to a "dotted" line? When I draw the construction line using command "XLINE", it is continuous.

I had a look at a post but still do not understand it ; reference to http://www.cadtutor.net/forum/showthread.php?11309-Change-a-continuous-line-to-a-dotted-line

I know I can change the "LineType" but I can only see continuous line and no dotted lines. Am I missing something? Am I suppose to load something? Please refer to attachment. Thank you in advance.

Enter LT for LINETYPE at the commandline, then when the dialogue box opens, choose from the available styles in the drawing,

or select LOAD which will introduce you to the motherlode, pick which ever ones you want to

add to the drawing.

Enter LT for LINETYPE at the commandline, then when the dialogue box opens, choose from the available styles in the drawing,

or select LOAD which will introduce you to the motherlode, pick which ever ones you want to

add to the drawing.

Perfect! Thank you Dadgad. I got it! But now another question...

I see the dots are very small. WHen I change the:

Select Line > Right Click > Properties > Linetype Scale > "number"

What is the meaning of 1? If I set to 10, I see the dot now... Is it just changing it until I see them or is there a mathematical meaning behind this value? Is it long to explain? If it is I will make another thread specifically made for that. Thank you in advance

It is a scale factor. You are familiar with scaling something up or down are you not?