@Nightrider said in QTextFormat: custom properties: A clarifying sentence in the docs would be helpful. As per your other threads there is no point making/nobody reading "suggestions" here, this is a user forum, for users of Qt just like yourself. If you want to make suggestions for changes in Qt (including documentation) you need to direct those to TQtC via https://bugreports.qt.io/.

@Ronhald OK, I've been digging around in this. Unfortunately, the debug helpers seem to focused on providing a more human-friendly depiction of complex structures. For basic integers the displayed data is actually formatted by Qt Creator's C++ code using QString::number(). This suppresses leading zeros. It may be possible to customise the Qt Creator source to take into consideration the sizeof(IntType) to generate a string of appropriate length.