In addition to the compositional templates in Lightroom (square, thirds, diagonals, full grid, etc.), it would be helpful to have an adjustable circle in the center as well as adjustable circles where the thirds intersect.

When composing a photograph with a round object as the subject, like a solar eclipse, it would be nice to have a precise layout tool where the adjustable template-circle can adjust to match, thus ensuring perfect centrality.

(While this might not be the best forum, posting elsewhere hasn't worked.)