We largely follow the FLAG editing conventions with the following exceptions: 1) spelling: AE instead of BE 2) hyphenation: for author compounds we use -- instead of - (to avoid confusion in cases like Gell-Mann--Oakes--Renner relation) and the same in scattering reactions (to avoid confusion in cases like charged-pion--proton scattering). There is a shortcut \hyph that defines this. 3) The \cref package is used for all references, at the beginning of sentences as \Cref. Citations use Ref. according to FLAG section 4. More conventions: 4) Display of errors: x(y), not x \pm y 5) Scientific notation: x \times 10^{-y}, not x \cdot 10^{-y} 6) logarithm: \log, not \ln 7) Abbreviations: we use LO HVP: a_\mu^\text{HVP, LO} NLO: a_\mu^\text{HVP, NLO} NNLO: a_\mu^\text{HVP, NNLO} LO HLbL: a_\mu^\text{HLbL} NLO HLbL: a_\mu^\text{HLbL, NLO} etc. as defined by the macros 8) we use capital letters for hadron masses (following FLAG), i.e., M_\pi and not m_\pi etc. 9) the pion decay constant is F_\pi = 92.2 MeV (f_\pi = \sqrt{2} F_\pi is also allowed) 10) Traces: Tr not tr 11) Differentials: d not \text{d} 12) space \, between end of equations and following punctuation 13) EM, e.m., em should be replaced by QED (if that is absolutely not possible, use EM)