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Posting code? Read this first! (3)

This is more addressed to the newer people of this forum, but I think it would be a good refresher for some. USE CODE TAGS!!! What is so special about these things? For one, they help show where you code begins and end…

About the ROOT category (2)
Error when compiling ROOT on Fedora 30 (4)
Limit on number of variables in user-defined cpp function for TTreeFormula (4)
Cannot compile TASImage class (4)
Pyroot failed to process google protobuf code while root prompt works fine (11)
Error when compiling T2K / ND280 ROOT v5r34p34n00 on LXPLUS (11)
Question about Axel's news posts (Tests and Argparse) (6)
Pads in canvas aren't updating ( 2 ) (24)
How to draw branch from Tree/TChain onto histogram array (1)
Splitting a canvas into (4x3), with a space between the first two rows (5)
3D coordinate from mouse curson position (9)
Implement standard shell script header? (3)
Loop over multiple ttree ( different names) in one root file at once (6)
PyROOT6.16 & RDataFrame: Filter-function does not return bool (5)
Graphical and variable cuts in TTree->Draw() ( 2 ) (26)
THttpServer: remember layout(s) ; interact with frame from the code (12)
Histogram x-axis range (13)
Plot legend for the fitted graph (4)
Export TGeo Geometry to step file (5)
PYTHIA 8.240 with ROOT 6.16/00 [Problem]/root-config: No such file or directory (2)
TH2F COLZ histogram without axis box around (9)
How to solve system of equations whose parameters are in a range in cern-root (2)
Problem in opening past rootfile (TClonesArray with TH1S) with root_v6.16 and ubuntu18 (3)
Lorentz bost jet and its constituent particles (1)
Compiling ROOT 6 executable on Windows (5)
Combining 2 root files in a new histogram TH2F - How do you fill Histograms from Chains? (4)
Minuit fit values of the parameters are way far from the initialized values (4)
Customizing drawing attributes for interactive projection (6)
Renaming all histograms in the directory: SetName() is weird (11)