Drop C keeps the familiar dropped-low-string idea while lowering the whole guitar. A scale map recalculates note positions for the tuning you select, so you can work from the actual strings on your guitar instead of carrying over a diagram from Standard tuning.
Drop C string notes
From the lowest string to the highest, Drop C is C-G-C-F-A-D. The scale finder displays strings from high to low as D-A-F-C-G-C. Check which order a tuning chart uses before matching its string names to your guitar.
Compared with Standard tuning, the five higher strings are each one whole tone lower and the lowest string is four semitones lower. That changes the note positions on the fretboard, so use a Drop C map when your guitar is tuned to Drop C.
Start with the key and scale you want to hear
For a C minor sound, select C, Minor and Drop C. The C natural minor scale contains C, D, E-flat, F, G, A-flat and B-flat. The map shows where these notes occur in this tuning, and the tab panel gives a playable fragment for each five-fret position.
Compare the C minor scale in Drop C with C Phrygian in Drop C. C Phrygian lowers the second scale degree from D to D-flat, creating a half-step above the root.
Practise the low string and the upper strings separately
Because the lowest string is tuned lower than the other five, practise its scale notes on their own first. Then play the same scale through the upper strings and reconnect the two areas using the fretboard map. This makes it easier to notice when a memorised Standard-tuning shape no longer fits.
Choose one position, play the tab slowly, and finish on a C root. Repeat in the next position, keeping the same scale and tuning selected. The note names and root markers help you check that the pattern still resolves to the intended key.
Use the same tuning to compare scale colours
Hold Drop C constant while switching among Minor, Phrygian and Harmonic Minor. This isolates the scale change while the string tuning stays the same. You can then switch to another key to see how the root moves without changing the tuning.
Open the C harmonic minor scale in Drop C, or use the guitar scale finder to choose a different key, scale and tuning.