| -verbose 7 | Verbosity of output. |
| -datatype u | Force writing of a new data type. |
| -select 3 | Selection number from STAR file selection column (default 1). |
| -sampling 1.5,1.5,1.5 | Sampling of input images (A/pixel; a single value can be given). |
| -resolution 20 | Resolution limit (angstrom, default Nyquist). |
| -scale 1.2 | Scale or magnification of reconstruction compared to original images (default 1). |
| -size 100,120,90 | Size of reconstruction (default from images). |
| -interpolation weighted | Interpolation type: nearest (default), weighted, trilinear. |
| -pad 3 | Image padding factor (default 2). |
| -symmetry D6 | Symmetry: Point group identifier |
| -CTF flip | Apply CTF correction to images before reconstruction (default not). |
| -wiener 0.15 | Wiener factor for CTF correction (default 0.2). |
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