https://zoomcharts.com/developers/en/time-chart/api-reference/settings/toolbar/periods.html
The default configuration is:
"periods": [
{
"name": "Last second",
"displayAnchor": "now",
"displayPeriod": "1 s",
"displayUnit": "25 ms"
},
{
"name": "Last minute",
"displayAnchor": "now",
"displayPeriod": "1 m",
"displayUnit": "1 s"
},
{
"name": "Last hour",
"displayAnchor": "now",
"displayPeriod": "1 h",
"displayUnit": "1 m"
},
{
"name": "Last day",
"displayAnchor": "now",
"displayPeriod": "1 d",
"displayUnit": "1 h"
},
{
"name": "Last week",
"displayAnchor": "now",
"displayPeriod": "1 w",
"displayUnit": "6 h"
},
{
"name": "Last month",
"displayAnchor": "now",
"displayPeriod": "1 M",
"displayUnit": "1 d"
},
{
"name": "Last year",
"displayAnchor": "now",
"displayPeriod": "1 y",
"displayUnit": "1 M"
},
{
"name": "All data",
"displayAnchor": "newestData",
"displayPeriod": "max",
"displayUnit": "auto"
}
]