1. Introduction
2. MUSE observations
3. Reduction and analysis of MUSE cubes
3.1. Basic reduction
3.2. Line emission measurement
4. Presentation of emission line maps
5. Mapping electron temperature and density
5.2. $T_{\mathrm{e}}$ and $N_{\mathrm{e}}$ from recombination species
5.3. Comparison of $T_{\mathrm{e}}$ and $N_{\mathrm{e}}$ maps
6. Extending diagnostics to faint outer regions
7. Ionization maps
7.1. $He^{+}$
7.2. $He^{++}$
7.3. $O^{0}$, $O^{+}$ and $O^{++}$
7.4. N ionization maps
7.5. S, Cl and Ar ionization maps
8. Abundance maps
8.1. He abundance
8.2. O abundance
8.3. N/O abundance
9. Integrated spectra
9.1. 1D photoionization model
10. Discussion
10.1. Limited IFU analysis
10.2. $T_{\mathrm{e}}$ diagnostics
10.3. Towards a flat He/H
10.4. ICFs
10.5. Potential for 3D modelling
11. Conclusions