A function closely related to ELF is the localized orbital locator (LOL), proposed by Schmider and Becke in 2000. Although its distribution characteristics are highly similar to those of ELF, and both are dimensionless functions with a range of [0,1], their definitions originate from different ideas. Localized molecular orbitals (LMOs) can be derived from unitary transformation of molecular orbitals, and their spatial distribution is highly localized. The LMOs representing valence electrons mainly appear in the regions where covalent bonds and lone pairs are located. The definition of the LOL function causes its value to be relatively large in the inner regions of LMOs and smaller in their boundary regions. According to our experience, in many cases, LOL provides better graphical representation than ELF. Specifically, the isosurface of LOL is easier to analyze visually, and it is often more effective at clearly displaying various covalent bonds and lone pairs in a single image. Therefore, when studying electronic structures such as covalent interactions and lone pair distributions, both LOL and ELF can be considered simultaneously. As an example, Fig. (a) shows the LOL isosurfaces of our recently theoretically predicted molecule, cyclo [18]nitrogen. This map directly displays the lone pair on each nitrogen atom and also indicates that there are two types of N-N bonds in this system. The LOL isosurface of the N-N bond with pure α-bonding is cylindrically distributed around the bond axis, while the isosurface of the N-N double bond formed by α and π electrons is significantly elongated along the direction of the π-electron distribution. Fig. (b)