Watch the Transposing Keys online guitar lesson by Tom Dempsey from Fretboard Phenom
Here I present the D and E blues scale in multiple positions. This will draw upon the skills learned in discovering the six different fingerings for the A blues scale and transposing them up the neck of the guitar. Use the reference sheets provided to assist you in making these connections. Practice them as presented here and then take them into other keys provided in the reference manual.