In Isaiah 6:1, is the word Lord written with a capital L and small letters?
Yes. Isaiah 6:1 records the word “Lord” with a capital L and the remaining letters in lowercase, not all capitals. That small-letter form points to Adonai as Master, fitting the master-servant relationship discussed in the context, where the master is over his servant.
Les explains that Isaiah 6 is another good example, and he notes the first verse: in the year King Uzziah died, Isaiah saw the Lord. The L is capitalized, but Les asks about the other letters and confirms they are small. This matches the small-letter usage he says to watch for throughout the Old Testament, where the word Lord in small letters refers to Adonai as Master, and the master is over his servant.
In the year that king Uzziah died I saw also the LORD sitting upon a throne, high and lifted up, and his train filled the temple.